A018027 -id:A018027 - cp's OEIS frontend

A018012 Powers of cube root of 13 rounded down.

1, 2, 5, 13, 30, 71, 169, 397, 934, 2197, 5165, 12146, 28561, 67156, 157907, 371293, 873034, 2052795, 4826809, 11349443, 26686340, 62748517, 147542764, 346922420, 815730721, 1918055940, 4509991465, 10604499373, 24934727221, 58629889045, 137858491849

Offset: 0

N. J. A. Sloane

nonn

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Cf. powers of cube root of k rounded down: A017979 (k=2), A017982 (k=3), A017985 (k=4), A017988 (k=5), A017991 (k=6), A017994 (k=7), A018000 (k=9), A018003 (k=10), A018006 (k=11), A018009 (k=12), this sequence (k=13), A018015 (k=14), A018018 (k=15), A018021 (k=16), A018024 (k=17), A018027 (k=18), A018030 (k=19), A018033 (k=20), A018036 (k=21), A018039 (k=22), A018042 (k=23), A018045 (k=24).

[Floor(13^(n/3)): n in [0..40]]; // Vincenzo Librandi, Jan 06 2014

Floor[(Power[13, (3)^-1])^Range[0, 40]]  (* Harvey P. Dale, Mar 18 2011 *)
Table[Floor[13^(n/3)], {n, 0, 40}] (* Vincenzo Librandi, Jan 06 2014 *)
Floor[CubeRoot[13]^Range[0,40]] (* Harvey P. Dale, Jun 01 2024 *)

More terms from Vincenzo Librandi, Jan 06 2014

A018015 Powers of cube root of 14 rounded down.

Original entry on oeis.org

1, 2, 5, 14, 33, 81, 196, 472, 1138, 2744, 6613, 15939, 38416, 92588, 223150, 537824, 1296232, 3124104, 7529536, 18147252, 43737461, 105413504, 254061541, 612324458, 1475789056, 3556861576, 8572542414, 20661046784, 49796062076, 120015593799, 289254654976

Offset: 0

N. J. A. Sloane

nonn

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Cf. powers of cube root of k rounded down: A017979 (k=2), A017982 (k=3), A017985 (k=4), A017988 (k=5), A017991 (k=6), A017994 (k=7), A018000 (k=9), A018003 (k=10), A018006 (k=11), A018009 (k=12), A018012 (k=13), this sequence (k=14), A018018 (k=15), A018021 (k=16), A018024 (k=17), A018027 (k=18), A018030 (k=19), A018033 (k=20), A018036 (k=21), A018039 (k=22), A018042 (k=23), A018045 (k=24).

[Floor(14^(n/3)): n in [0..40]]; // Vincenzo Librandi, Jan 06 2014

Table[Floor[14^(n/3)], {n, 0, 40}] (* Vincenzo Librandi, Jan 06 2014 *)
Floor[Surd[14,3]^Range[0,30]] (* Harvey P. Dale, Apr 01 2019 *)

a(n)=sqrtnint(14^n,3) \\ Charles R Greathouse IV, Feb 02 2017

More terms from Vincenzo Librandi, Jan 06 2014

A018018 Powers of cube root of 15 rounded down.

Original entry on oeis.org

1, 2, 6, 15, 36, 91, 225, 554, 1368, 3375, 8323, 20527, 50625, 124851, 307911, 759375, 1872779, 4618672, 11390625, 28091696, 69280082, 170859375, 421375453, 1039201231, 2562890625, 6320631804, 15588018473, 38443359375, 94809477068, 233820277107

Offset: 0

N. J. A. Sloane

nonn

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Cf. powers of cube root of k rounded down: A017979 (k=2), A017982 (k=3), A017985 (k=4), A017988 (k=5), A017991 (k=6), A017994 (k=7), A018000 (k=9), A018003 (k=10), A018006 (k=11), A018009 (k=12), A018012 (k=13), A018015 (k=14), this sequence (k=15), A018021 (k=16), A018024 (k=17), A018027 (k=18), A018030 (k=19), A018033 (k=20), A018036 (k=21), A018039 (k=22), A018042 (k=23), A018045 (k=24).

[Floor(15^(n/3)): n in [0..40]]; // Vincenzo Librandi, Jan 06 2014

Table[Floor[15^(n/3)], {n, 0, 40}] (* Vincenzo Librandi, Jan 06 2014 *)
Floor[Surd[15,3]^Range[0,40]] (* Harvey P. Dale, Jun 21 2017 *)

More terms from Vincenzo Librandi, Jan 06 2014

A018021 Powers of cube root of 16 rounded down.

Original entry on oeis.org

1, 2, 6, 16, 40, 101, 256, 645, 1625, 4096, 10321, 26007, 65536, 165140, 416127, 1048576, 2642245, 6658042, 16777216, 42275935, 106528681, 268435456, 676414963, 1704458900, 4294967296, 10822639409, 27271342415, 68719476736, 173162230554, 436341478645

Offset: 0

N. J. A. Sloane

nonn

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Cf. powers of cube root of k rounded down: A017979 (k=2), A017982 (k=3), A017985 (k=4), A017988 (k=5), A017991 (k=6), A017994 (k=7), A018000 (k=9), A018003 (k=10), A018006 (k=11), A018009 (k=12), A018012 (k=13), A018015 (k=14), A018018 (k=15), this sequence (k=16), A018024 (k=17), A018027 (k=18), A018030 (k=19), A018033 (k=20), A018036 (k=21), A018039 (k=22), A018042 (k=23), A018045 (k=24).

[Floor(16^(n/3)): n in [0..40]]; // Vincenzo Librandi, Jan 06 2014

Table[Floor[16^(n/3)], {n, 0, 40}] (* Vincenzo Librandi, Jan 06 2014 *)

More terms from Vincenzo Librandi, Jan 06 2014

A018030 Powers of cube root of 19 rounded down.

Original entry on oeis.org

1, 2, 7, 19, 50, 135, 361, 963, 2570, 6859, 18302, 48838, 130321, 347748, 927933, 2476099, 6607226, 17630734, 47045881, 125537306, 334983955, 893871739, 2385208822, 6364695153, 16983563041, 45318967619, 120929207914, 322687697779, 861060384775, 2297654950384

Offset: 0

N. J. A. Sloane

nonn

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Cf. powers of cube root of k rounded down: A017979 (k=2), A017982 (k=3), A017985 (k=4), A017988 (k=5), A017991 (k=6), A017994 (k=7), A018000 (k=9), A018003 (k=10), A018006 (k=11), A018009 (k=12), A018012 (k=13), A018015 (k=14), A018018 (k=15), A018021 (k=16), A018024 (k=17), A018027 (k=18), this sequence (k=19), A018033 (k=20), A018036 (k=21), A018039 (k=22), A018042 (k=23), A018045 (k=24).

[Floor(19^(n/3)): n in [0..40]]; // Vincenzo Librandi, Jan 06 2014

Table[Floor[19^(n/3)], {n, 0, 40}]  (* Vincenzo Librandi, Jan 06 2014 *)

More terms from Vincenzo Librandi, Jan 06 2014

A018033 Powers of cube root of 20 rounded down.

Original entry on oeis.org

1, 2, 7, 20, 54, 147, 400, 1085, 2947, 8000, 21715, 58944, 160000, 434306, 1178890, 3200000, 8686136, 23577801, 64000000, 173722727, 471556031, 1280000000, 3474454549, 9431120636, 25600000000, 69489090984, 188622412730, 512000000000, 1389781819696

Offset: 0

N. J. A. Sloane

nonn

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Cf. powers of cube root of k rounded down: A017979 (k=2), A017982 (k=3), A017985 (k=4), A017988 (k=5), A017991 (k=6), A017994 (k=7), A018000 (k=9), A018003 (k=10), A018006 (k=11), A018009 (k=12), A018012 (k=13), A018015 (k=14), A018018 (k=15), A018021 (k=16), A018024 (k=17), A018027 (k=18), A018030 (k=19), this sequence (k=20), A018036 (k=21), A018039 (k=22), A018042 (k=23), A018045 (k=24).

[Floor(20^(n/3)): n in [0..40]]; // Vincenzo Librandi, Jan 06 2014

Table[Floor[20^(n/3)], {n, 0, 40}] (* Vincenzo Librandi, Jan 06 2014 *)
Floor[CubeRoot[20]^Range[0,30]] (* Harvey P. Dale, Feb 14 2025 *)

More terms from Vincenzo Librandi, Jan 06 2014

A018036 Powers of cube root of 21 rounded down.

Original entry on oeis.org

1, 2, 7, 21, 57, 159, 441, 1216, 3356, 9261, 25550, 70491, 194481, 536558, 1480323, 4084101, 11267724, 31086798, 85766121, 236622224, 652822776, 1801088541, 4969066719, 13709278306, 37822859361, 104350401110, 287894844440, 794280046581, 2191358423329

Offset: 0

N. J. A. Sloane

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Cf. powers of cube root of k rounded down: A017979 (k=2), A017982 (k=3), A017985 (k=4), A017988 (k=5), A017991 (k=6), A017994 (k=7), A018000 (k=9), A018003 (k=10), A018006 (k=11), A018009 (k=12), A018012 (k=13), A018015 (k=14), A018018 (k=15), A018021 (k=16), A018024 (k=17), A018027 (k=18), A018030 (k=19), A018033 (k=20), this sequence (k=21), A018039 (k=22), A018042 (k=23), A018045 (k=24).

[Floor(21^(n/3)): n in [0..40]]; // Vincenzo Librandi, Jan 06 2014

Table[Floor[21^(n/3)], {n, 0, 40}]  (* Vincenzo Librandi, Jan 06 2014 *)
Floor[CubeRoot[21]^Range[0,30]] (* Harvey P. Dale, May 25 2025 *)

a(n) = floor(21^(n/3)). - Wesley Ivan Hurt, Sep 05 2025

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A018039 Powers of cube root of 22 rounded down.

Original entry on oeis.org

1, 2, 7, 22, 61, 172, 484, 1356, 3800, 10648, 29836, 83601, 234256, 656394, 1839243, 5153632, 14440679, 40463352, 113379904, 317694950, 890193745, 2494357888, 6989288906, 19584262410, 54875873536, 153764355951, 430853773030, 1207269217792, 3382815830942

Offset: 0

N. J. A. Sloane

nonn

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Cf. powers of cube root of k rounded down: A017979 (k=2), A017982 (k=3), A017985 (k=4), A017988 (k=5), A017991 (k=6), A017994 (k=7), A018000 (k=9), A018003 (k=10), A018006 (k=11), A018009 (k=12), A018012 (k=13), A018015 (k=14), A018018 (k=15), A018021 (k=16), A018024 (k=17), A018027 (k=18), A018030 (k=19), A018033 (k=20), A018036 (k=21), this sequence (k=22), A018042 (k=23), A018045 (k=24).

[Floor(22^(n/3)): n in [0..40]]; // Vincenzo Librandi, Jan 07 2014

Table[Floor[22^(n/3)], {n, 0, 40}] (* Vincenzo Librandi, Jan 07 2014 *)
Floor[CubeRoot[22]^Range[0,30]] (* Harvey P. Dale, Jul 29 2024 *)

More terms from Vincenzo Librandi, Jan 07 2014

A018042 Powers of cube root of 23 rounded down.

Original entry on oeis.org

1, 2, 8, 23, 65, 186, 529, 1504, 4278, 12167, 34601, 98401, 279841, 795830, 2263236, 6436343, 18304103, 52054435, 148035889, 420994376, 1197252006, 3404825447, 9682870660, 27536796142, 78310985281, 222706025200, 633346311281, 1801152661463, 5122238579606

Offset: 0

N. J. A. Sloane

nonn

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Cf. powers of cube root of k rounded down: A017979 (k=2), A017982 (k=3), A017985 (k=4), A017988 (k=5), A017991 (k=6), A017994 (k=7), A018000 (k=9), A018003 (k=10), A018006 (k=11), A018009 (k=12), A018012 (k=13), A018015 (k=14), A018018 (k=15), A018021 (k=16), A018024 (k=17), A018027 (k=18), A018030 (k=19), A018033 (k=20), A018036 (k=21), A018039 (k=22), this sequence (k=23), A018045 (k=24).

[Floor(23^(n/3)): n in [0..40]]; // Vincenzo Librandi, Jan 07 2014

Table[Floor[23^(n/3)], {n, 0, 40}] (* Vincenzo Librandi, Jan 07 2014 *)

a(n)=sqrtnint(23^n,3) \\ Charles R Greathouse IV, Nov 01 2016

More terms from Vincenzo Librandi, Jan 07 2014

A018045 Powers of cube root of 24 rounded down.

Original entry on oeis.org

1, 2, 8, 24, 69, 199, 576, 1661, 4792, 13824, 39875, 115020, 331776, 957007, 2760487, 7962624, 22968182, 66251701, 191102976, 551236370, 1590040835, 4586471424, 13229672880, 38160980055, 110075314176, 317512149143, 915863521339, 2641807540224, 7620291579445

Offset: 0

N. J. A. Sloane

nonn

Vincenzo Librandi, Table of n, a(n) for n = 0..200

Cf. powers of cube root of k rounded down: A017979 (k=2), A017982 (k=3), A017985 (k=4), A017988 (k=5), A017991 (k=6), A017994 (k=7), A018000 (k=9), A018003 (k=10), A018006 (k=11), A018009 (k=12), A018012 (k=13), A018015 (k=14), A018018 (k=15), A018021 (k=16), A018024 (k=17), A018027 (k=18), A018030 (k=19), A018033 (k=20), A018036 (k=21), A018039 (k=22), A018042 (k=23), this sequence (k=24).

[Floor(24^(n/3)): n in [0..40]]; // Vincenzo Librandi, Jan 07 2014

Table[Floor[24^(n/3)], {n, 0, 40}] (* Vincenzo Librandi, Jan 07 2014 *)
Floor[Surd[24,3]^Range[0,30]] (* Harvey P. Dale, Sep 14 2019 *)

More terms from Vincenzo Librandi, Jan 07 2014

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A018012 Powers of cube root of 13 rounded down.

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A018015 Powers of cube root of 14 rounded down.

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A018018 Powers of cube root of 15 rounded down.

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A018021 Powers of cube root of 16 rounded down.

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A018030 Powers of cube root of 19 rounded down.

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A018033 Powers of cube root of 20 rounded down.

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A018036 Powers of cube root of 21 rounded down.

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A018039 Powers of cube root of 22 rounded down.

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