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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 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..200 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 A291414 Adjacent sequences:  A018015 A018016 A018017 * A018019 A018020 A018021 KEYWORD nonn AUTHOR EXTENSIONS More terms from Vincenzo Librandi, Jan 06 2014 STATUS approved

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Last modified August 21 08:34 EDT 2019. Contains 326162 sequences. (Running on oeis4.)