A156493 - OEIS

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A156493

Number of n X n arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 32.

1, 0, 2, 6, 72, 804, 78655, 960648, 232585695, 21668424870

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OFFSET

2,3

LINKS

Table of n, a(n) for n=2..11.

CROSSREFS

Sequence in context: A152885 A295182 A052613 * A339299 A218891 A117515

Adjacent sequences: A156490 A156491 A156492 * A156494 A156495 A156496

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 09 2009

STATUS

approved