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A159406 Number of n X n arrays of squares of integers with every (n-1)X(n-1) subblock summing to 20 1
46, 91930, 140711904, 225806690703, 250593181727052, 179001707241146535, 75883146328596287296, 18277998911418077944389, 2521047787492275773799084, 210383258780959085774161729, 11422723249364268387819064596 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

LINKS

R. H. Hardin, Table of n, a(n) for n=3..18

CROSSREFS

Sequence in context: A152501 A209474 A336439 * A191939 A159446 A116328

Adjacent sequences:  A159403 A159404 A159405 * A159407 A159408 A159409

KEYWORD

nonn

AUTHOR

R. H. Hardin Apr 11 2009

STATUS

approved

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Last modified December 9 04:45 EST 2021. Contains 349626 sequences. (Running on oeis4.)