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A156502 Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 38. 0
2, 108, 80, 22640, 182640, 60084184, 1377842504, 1573982139776 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

LINKS

Table of n, a(n) for n=3..10.

CROSSREFS

Sequence in context: A340054 A267550 A224819 * A111456 A157067 A287153

Adjacent sequences:  A156499 A156500 A156501 * A156503 A156504 A156505

KEYWORD

nonn

AUTHOR

R. H. Hardin Feb 09 2009

STATUS

approved

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Last modified April 16 12:45 EDT 2021. Contains 343037 sequences. (Running on oeis4.)