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A047698 Can be written in 2 ways as sum of 4 positive 7th powers. 0
2056364173794800, 12191487610289536, 263214614245734400, 696885239160606459, 1560510414117060608 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..5.

D. J. Bernstein, Enumerating solutions to p(a) + q(b) = r(c) + s(d)

R. L. Ekl, New Results in Equal Sums of Like Powers, Math. Comput. 67, 1309-1315, 1998.

CROSSREFS

Sequence in context: A204419 A067495 A216910 * A246252 A058445 A290540

Adjacent sequences:  A047695 A047696 A047697 * A047699 A047700 A047701

KEYWORD

nonn,hard

AUTHOR

N. J. A. Sloane.

EXTENSIONS

Corrected by D. J. Bernstein (djb(AT)cr.yp.to)

STATUS

approved

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Last modified December 17 09:43 EST 2018. Contains 318193 sequences. (Running on oeis4.)