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A156512 Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 50. 0
3, 22, 474, 21676, 6117690, 8086830378, 27448134968478, 351300513333271976 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,1

LINKS

Table of n, a(n) for n=2..9.

CROSSREFS

Sequence in context: A196734 A271849 A271850 * A119770 A272659 A233748

Adjacent sequences:  A156509 A156510 A156511 * A156513 A156514 A156515

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 09 2009

STATUS

approved

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Last modified May 7 19:46 EDT 2021. Contains 343652 sequences. (Running on oeis4.)