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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

N. J. A. Sloane.

EXTENSIONS

More terms from Vincenzo Librandi, Jan 06 2014

STATUS

approved

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Last modified February 15 20:32 EST 2019. Contains 320138 sequences. (Running on oeis4.)