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A159408 Number of nXn arrays of squares of integers with every (n-1)X(n-1) subblock summing to 21 +0
1
80, 81970, 198598120, 364613564592, 491411402965408, 433784038380001756, 230474677737192144368, 70203649179688320074704, 12227440515845132316709008, 1273365210975360016227907628 (list; graph; listen)
OFFSET

3,1

LINKS

R. H. Hardin, Table of n, a(n) for n=3..16

CROSSREFS

Sequence in context: A159377 A068273 A068285 this_sequence A159391 A051184 A159444

Adjacent sequences: A159405 A159406 A159407 this_sequence A159409 A159410 A159411

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) Apr 11 2009

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.


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