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

0,2

Links

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

Mathematica

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

Prog

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

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).

Sequence in context: A255962 A190571 A317881 * A192472 A147106 A078161

Adjacent sequences: A018017 A018018 A018019 * A018021 A018022 A018023

Keyword

nonn

Author

N. J. A. Sloane

Extensions

More terms from Vincenzo Librandi, Jan 09 2014

Status

approved