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A159371 Number of n X n arrays of squares of integers summing to 8 1
6, 675, 34830, 1347525, 32145930, 460513662, 4464289944, 32292364770, 186464336850, 900743450145, 3764484413118, 13954005203463, 46750424936670, 143665627355100, 409707743053920, 1094582930018724, 2760817157366382 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

R. H. Hardin, Table of n, a(n) for n=2..100

FORMULA

Empirical: n^2*(n^2-1)*(n^12-27*n^10+295*n^8+15*n^6-10016*n^4+35652*^2-15120)/40320. [From R. J. Mathar, Aug 11 2009]

CROSSREFS

Sequence in context: A333639 A331724 A046985 * A159620 A125535 A343140

Adjacent sequences:  A159368 A159369 A159370 * A159372 A159373 A159374

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 11 2009

STATUS

approved

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Last modified August 11 15:10 EDT 2022. Contains 356066 sequences. (Running on oeis4.)