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A156524 Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 73. 0
2, 2, 102, 194, 52440, 367472, 1145093308, 43695620566 (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: A055470 A270591 A210467 * A194027 A003110 A100956

Adjacent sequences:  A156521 A156522 A156523 * A156525 A156526 A156527

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 09 2009

STATUS

approved

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Last modified February 21 05:23 EST 2020. Contains 332086 sequences. (Running on oeis4.)