A156485 Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 26.

2, 0, 96, 88, 9866, 64560, 10075588, 176105168, 80948165500, 4500246590912

Offset

2,1

Links

Table of n, a(n) for n=2..11.

Crossrefs

Sequence in context: A136559 A009740 A132860 * A307946 A009270 A033838

Adjacent sequences: A156482 A156483 A156484 * A156486 A156487 A156488

Keyword

nonn

Author

R. H. Hardin Feb 09 2009

Status

approved