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A018018
Powers of cube root of 15 rounded down.
21
1, 2, 6, 15, 36, 91, 225, 554, 1368, 3375, 8323, 20527, 50625, 124851, 307911, 759375, 1872779, 4618672, 11390625, 28091696, 69280082, 170859375, 421375453, 1039201231, 2562890625, 6320631804, 15588018473, 38443359375, 94809477068, 233820277107
OFFSET
0,2
LINKS
MATHEMATICA
Table[Floor[15^(n/3)], {n, 0, 40}] (* Vincenzo Librandi, Jan 06 2014 *)
Floor[Surd[15, 3]^Range[0, 40]] (* Harvey P. Dale, Jun 21 2017 *)
PROG
(Magma) [Floor(15^(n/3)): n in [0..40]]; // Vincenzo Librandi, Jan 06 2014
CROSSREFS
Cf. powers of cube root of k rounded down: A017979 (k=2), A017982 (k=3), A017985 (k=4), A017988 (k=5), A017991 (k=6), A017994 (k=7), A018000 (k=9), A018003 (k=10), A018006 (k=11), A018009 (k=12), A018012 (k=13), A018015 (k=14), this sequence (k=15), A018021 (k=16), A018024 (k=17), A018027 (k=18), A018030 (k=19), A018033 (k=20), A018036 (k=21), A018039 (k=22), A018042 (k=23), A018045 (k=24).
Sequence in context: A215149 A017923 A238830 * A030009 A061261 A335903
KEYWORD
nonn
EXTENSIONS
More terms from Vincenzo Librandi, Jan 06 2014
STATUS
approved