A098128 - OEIS

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A098128

Perfect powers whose products of nonzero digits are also perfect powers.

0

1, 4, 8, 9, 49, 81, 128, 144, 289, 343, 400, 441, 484, 841, 900, 1024, 1331, 1444, 2048, 2209, 2401, 2809, 3249, 3364, 4096, 4900, 7744, 8000, 8100, 8192, 8281, 8649, 9409, 9604, 10404, 11236, 11449, 11664, 11881, 13689, 13924, 14400, 14884, 16384, 16641

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OFFSET

1,2

LINKS

Table of n, a(n) for n=1..45.

EXAMPLE

484 is in the sequence because 22^2 = 484 and 4*8*4 = 128 = 2^7.

CROSSREFS

Sequence in context: A077572 A239520 A083807 * A217700 A118895 A327654

Adjacent sequences: A098125 A098126 A098127 * A098129 A098130 A098131

KEYWORD

base,nonn

AUTHOR

Jason Earls, Sep 26 2004

STATUS

approved