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A156522 Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 65. 0
4, 18, 372, 16404, 5141900, 9054510666, 197569263663408, 15383832371115704364 (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: A214168 A214189 A214240 * A086400 A082022 A114574

Adjacent sequences:  A156519 A156520 A156521 * A156523 A156524 A156525

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 09 2009

STATUS

approved

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Last modified January 20 10:51 EST 2020. Contains 331081 sequences. (Running on oeis4.)