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A018158
Powers of fifth root of 15 rounded up.
1
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
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
KEYWORD
nonn
AUTHOR
STATUS
approved