A156480 Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 24.

2, 22, 64, 3923, 32236, 10001476, 183254724, 94893077616, 3439098945960

Offset

3,1

Links

Table of n, a(n) for n=3..11.

Crossrefs

Sequence in context: A152995 A273366 A053940 * A348488 A226406 A226335

Adjacent sequences: A156477 A156478 A156479 * A156481 A156482 A156483

Keyword

nonn

Author

R. H. Hardin Feb 09 2009

Status

approved