A018018 Powers of cube root of 15 rounded down.

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

Author

N. J. A. Sloane

Keywords

• nonn

Links

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

Crossrefs

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).

Programs

Magma

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

Mathematica

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 *)

Extensions

More terms from Vincenzo Librandi, Jan 06 2014