A167127 - OEIS

A167127

Cubes that may be transformed into squares by prefixing with a single nonzero digit.

1, 216, 68921, 884736, 1000000, 216000000, 68921000000, 884736000000, 1000000000000, 216000000000000, 68921000000000000, 884736000000000000, 1000000000000000000, 216000000000000000000, 68921000000000000000000, 884736000000000000000000

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..16.

EXAMPLE

The cube 1 = 1^3 becomes the square 81 =9^2 by prefixing an 8.

The cube 216 = 6^3 becomes the square 9216 = 96^2 by prefixing a 9.

68921=41^3 becomes 168921=411^2 by prefixing a 1.

CROSSREFS

Sequence in context: A299994 A124009 A134358 * A269821 A268364 A358657

Adjacent sequences: A167124 A167125 A167126 * A167128 A167129 A167130

KEYWORD

nonn,base

AUTHOR

Claudio Meller, Oct 28 2009

EXTENSIONS

Slightly edited by R. J. Mathar, Nov 05 2009

a(6) corrected and a(11)-a(16) from Donovan Johnson, Feb 19 2011

STATUS

approved