A159408 Number of n X n arrays of squares of integers with every (n-1)X(n-1) subblock summing to 21.

80, 81970, 198598120, 364613564592, 491411402965408, 433784038380001756, 230474677737192144368, 70203649179688320074704, 12227440515845132316709008, 1273365210975360016227907628

Offset

3,1

Links

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

Crossrefs

Sequence in context: A183582 A068273 A068285 * A159391 A323448 A231036

Adjacent sequences: A159405 A159406 A159407 * A159409 A159410 A159411

Keyword

nonn

Author

R. H. Hardin, Apr 11 2009

Status

approved