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A159407 Number of n X n arrays of squares of integers summing to 21. 1
28, 7182, 3923136, 2168352600, 1094602264164, 437181997913808, 123598365410489088, 22732655012770729752, 2620728473996336526900, 193309311936589609598244, 9610726322148658419480768, 340892034159072851206852178, 9072999131907316862007475724 (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 A159407

FORMULA

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

CROSSREFS

Sequence in context: A221935 A230268 A203328 * A099058 A281128 A222018

Adjacent sequences:  A159404 A159405 A159406 * A159408 A159409 A159410

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 11 2009

STATUS

approved

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Last modified January 26 08:44 EST 2022. Contains 350578 sequences. (Running on oeis4.)