A018158 Powers of fifth root of 15 rounded up.

1, 2, 3, 6, 9, 15, 26, 45, 77, 131, 225, 387, 665, 1143, 1964, 3375, 5801, 9971, 17137, 29455, 50625, 87013, 149556, 257052, 441813, 759375, 1305193, 2243329, 3855770, 6627189, 11390625, 19577887, 33649922

Offset

0,2

Links

Table of n, a(n) for n=0..32.

Formula

a(n) = ceiling(15^(n/5)). - Wesley Ivan Hurt, Dec 28 2013

Maple

A018158:=n->ceil(15^(n/5)); seq(A018158(n), n=0..50); # Wesley Ivan Hurt, Dec 28 2013

Mathematica

Table[Ceiling[15^(n/5)], {n, 0, 50}] (* Wesley Ivan Hurt, Dec 28 2013 *)

Crossrefs

Sequence in context: A114323 A355324 A293631 * A057928 A026735 A006868

Adjacent sequences: A018155 A018156 A018157 * A018159 A018160 A018161

Keyword

nonn

Author

N. J. A. Sloane.

Status

approved