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 A018033 Powers of cube root of 20 rounded down. 21
 1, 2, 7, 20, 54, 147, 400, 1085, 2947, 8000, 21715, 58944, 160000, 434306, 1178890, 3200000, 8686136, 23577801, 64000000, 173722727, 471556031, 1280000000, 3474454549, 9431120636, 25600000000, 69489090984, 188622412730, 512000000000, 1389781819696 (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[20^(n/3)], {n, 0, 40}] (* Vincenzo Librandi, Jan 06 2014 *) PROG (MAGMA) [Floor(20^(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), A018018 (k=15),  A018021 (k=16), A018024 (k=17), A018027 (k=18), A018030 (k=19), this sequence (k=20), A018036 (k=21), A018039 (k=22), A018042 (k=23), A018045 (k=24). Sequence in context: A128183 A027418 A035508 * A000149 A080041 A049681 Adjacent sequences:  A018030 A018031 A018032 * A018034 A018035 A018036 KEYWORD nonn AUTHOR EXTENSIONS More terms from Vincenzo Librandi, Jan 06 2014 STATUS approved

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Last modified August 24 14:13 EDT 2019. Contains 326283 sequences. (Running on oeis4.)