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A227648 Perfect powers equal to the sum of 7 factorial numbers. 2
8, 9, 16, 25, 27, 32, 36, 64, 81, 100, 128, 144, 169, 196, 256, 324, 484, 512, 529, 625, 729, 784, 841, 1089, 1225, 2187, 2197, 2916, 3025, 3721, 5184, 5776, 6241, 6724, 10816, 15129, 15876, 20164, 25921, 40401, 40804, 42025, 45369, 47524, 51984, 57600, 80656 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

a(80), if it exists, is larger than 10^100.

LINKS

Giovanni Resta, Table of n, a(n) for n = 1..79 (terms < 10^100)

Giovanni Resta, Decompositions for a(1)-a(79)

EXAMPLE

83521 = 17^4 = 1! + 6! + 6! + 6! + 6! + 8! + 8!.

CROSSREFS

Cf. A114377, A227644-A227651.

Sequence in context: A231016 A169817 A227649 * A192636 A265731 A227646

Adjacent sequences:  A227645 A227646 A227647 * A227649 A227650 A227651

KEYWORD

nonn

AUTHOR

Giovanni Resta, Jul 19 2013

STATUS

approved

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Last modified June 25 05:41 EDT 2019. Contains 324346 sequences. (Running on oeis4.)