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A159379 Number of n X n arrays of squares of integers summing to 10 1
18, 1080, 99248, 6710160, 312975306, 8820400232, 155825544448, 1902742912440, 17422385919290, 126966804496576, 769002076834992, 3997219502682952, 18271131867527266, 74845992604425840, 278918348891883520 (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 G.f.: -2*x^2*(1+x)*(9 + 342*x + 39832*x^2 + 2374574*x^3 + 93413104*x^4 + 1672161938*x^5 + 12313058136*x^6 + 40002238314*x^7 + 59444070702*x^8 + 40002238314*x^9 + 12313058136*x^10 + 1672161938*x^11 + 93413104*x^12 + 2374574*x^13 + 39832*x^14 + 342*x^15 + 9*x^16)/(-1+x)^21. - Vaclav Kotesovec, Nov 30 2012

CROSSREFS

Sequence in context: A275653 A214232 A146197 * A052135 A033518 A064564

Adjacent sequences:  A159376 A159377 A159378 * A159380 A159381 A159382

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 11 2009

STATUS

approved

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Last modified April 23 13:51 EDT 2017. Contains 285329 sequences.