A018020 Powers of cube root of 15 rounded up.

1, 3, 7, 15, 37, 92, 225, 555, 1369, 3375, 8324, 20528, 50625, 124852, 307912, 759375, 1872780, 4618673, 11390625, 28091697, 69280083, 170859375, 421375454, 1039201232, 2562890625, 6320631805, 15588018474, 38443359375, 94809477069, 233820277108

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 ceiling up: A017981 (k=2), A017984 (k=3), A017987 (k=4), A017990 (k=5), A017993 (k=6), A017996 (k=7), A018002 (k=9), A018005 (k=10), A018008 (k=11), A018011 (k=12), A018014 (k=13), A018017 (k=14), this sequence (k=15), A018023 (k=16), A018026 (k=17), A018029 (k=18), A018032 (k=19), A018035 (k=20), A018038 (k=21), A018041 (k=22), A018044 (k=23), A018047 (k=24).

Programs

Magma

[Ceiling(15^(n/3)): n in [0..40]]; // Vincenzo Librandi, Jan 09 2014

Mathematica

Table[Ceiling[15^(n/3)], {n, 0, 40}] (* Vincenzo Librandi, Jan 09 2014 *)

Extensions

More terms from Vincenzo Librandi, Jan 09 2014