A018034 - OEIS

A018034

Powers of cube root of 20 rounded to nearest integer.

1, 3, 7, 20, 54, 147, 400, 1086, 2947, 8000, 21715, 58945, 160000, 434307, 1178890, 3200000, 8686136, 23577802, 64000000, 173722727, 471556032, 1280000000, 3474454549, 9431120637, 25600000000, 69489090985, 188622412730, 512000000000, 1389781819697

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OFFSET

0,2

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..200

MATHEMATICA

Table[Round[20^(n/3)], {n, 0, 40}] (* Vincenzo Librandi, Jan 08 2014 *)

Table[Round[Surd[20, 3]^n], {n, 0, 40}] (* Harvey P. Dale, Sep 10 2021 *)

PROG

(Magma) [Round(20^(n/3)): n in [0..40]]; // Vincenzo Librandi, Jan 08 2014

CROSSREFS

Cf. powers of cube root of k rounded up: A017980 (k=2), A017983 (k=3), A017986 (k=4), A017989 (k=5), A017992 (k=6), A017995 (k=7), A018001 (k=9), A018004 (k=10), A018007 (k=11), A018010 (k=12), A018013 (k=13), A018016 (k=14), A018019 (k=15), A018022 (k=16), A018025 (k=17), A018028 (k=18), A018031 (k=19), this sequence (k=20), A018037 (k=21), A018040 (k=22), A018043 (k=23), A018046 (k=24).

Sequence in context: A003097 A109220 A293734 * A293735 A293736 A293737

Adjacent sequences: A018031 A018032 A018033 * A018035 A018036 A018037

KEYWORD

nonn

AUTHOR

N. J. A. Sloane

EXTENSIONS

More terms from Vincenzo Librandi, Jan 08 2014

STATUS

approved