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A159405 Number of n X n arrays of squares of integers summing to 20. 1
18, 7326, 2995908, 1455763635, 622097389872, 206307703531587, 47588288640846912, 7046841590377578801, 653092799056599247740, 39121901776525814650965, 1603648230996545513760708, 47634024309523287458232228, 1076943060410127149424142230 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

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

Vaclav Kotesovec, G.f. for A159405

FORMULA

G.f.: see link above. - Vaclav Kotesovec, Dec 04 2012

CROSSREFS

Sequence in context: A013723 A232595 A335685 * A265450 A213402 A248804

Adjacent sequences:  A159402 A159403 A159404 * A159406 A159407 A159408

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 11 2009

STATUS

approved

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Last modified January 18 13:38 EST 2022. Contains 350455 sequences. (Running on oeis4.)