A017989 Powers of cube root of 5 rounded to nearest integer.

1, 2, 3, 5, 9, 15, 25, 43, 73, 125, 214, 366, 625, 1069, 1828, 3125, 5344, 9138, 15625, 26718, 45688, 78125, 133592, 228439, 390625, 667959, 1142194, 1953125, 3339797, 5710972, 9765625, 16698984, 28554861, 48828125, 83494919, 142774304, 244140625, 417474596

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 up: A017980 (k=2), A017983 (k=3), A017986 (k=4), this sequence (k=5), A017992 (k=6), A017995 (k=7), A018001 (k=9), A018004 (k=10), A018007 (k=11), A018010 (k=12), A018013 (k=13), A018016 (k=14), A018019 (k=15), A018022 (k=16), A018025 (k=17), A018028 (k=18), A018031 (k=19), A018034 (k=20), A018037 (k=21), A018040 (k=22), A018043 (k=23), A018046 (k=24).

Programs

Magma

[Round(5^(n/3)): n in [0..50]]; // Vincenzo Librandi, Jan 07 2014

Mathematica

Table[Round[5^(n/3)], {n, 0, 40}] (* Vincenzo Librandi, Jan 07 2014 *)
Round[Surd[5,3]^Range[0,40]] (* Harvey P. Dale, Mar 24 2018 *)

Extensions

More terms from Vincenzo Librandi, Jan 07 2014