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

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