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A035130 Cubes when digits rotated right once remain cubic. 3
1, 8, 125, 54439939 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

Those resulting in leading zeros excluded.

LINKS

Table of n, a(n) for n=1..4.

Eric Weisstein's World of Mathematics, Cubic Number

FORMULA

a(n) = A035128(n)^3. - R. J. Mathar, Jan 25 2017

EXAMPLE

5^3 = 125 -> 512 = 8^3.

MATHEMATICA

Select[Range[10000]^3, IntegerQ[Surd[FromDigits[RotateRight[ IntegerDigits[#]]], 3]]&] (* Harvey P. Dale, May 25 2015 *)

PROG

(MAGMA) [k^3:k in [1..100000]| IsPower(Seqint((Intseq(Floor(k^3/10)) cat [Intseq(k^3)[1]])), 3)]; // Marius A. Burtea, Oct 08 2019

CROSSREFS

Cf. A035126, A035128, A035131.

Sequence in context: A227851 A076960 A298623 * A055762 A281714 A236549

Adjacent sequences:  A035127 A035128 A035129 * A035131 A035132 A035133

KEYWORD

nonn,base,hard

AUTHOR

Patrick De Geest, Nov 15 1998

STATUS

approved

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Last modified December 15 11:43 EST 2019. Contains 329999 sequences. (Running on oeis4.)