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A156482 Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 25. 0
1, 4, 16, 142, 2832, 250472, 46559350, 70028916760, 424743527181996, 5415473412421080256 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..10.

CROSSREFS

Sequence in context: A061131 A136651 A195899 * A173346 A319166 A304193

Adjacent sequences:  A156479 A156480 A156481 * A156483 A156484 A156485

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 09 2009

STATUS

approved

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Last modified November 14 17:17 EST 2019. Contains 329126 sequences. (Running on oeis4.)