A156452 Number of n X n arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to 10.

2, 0, 32, 32, 1718, 5108, 239978, 1380432, 102471151, 1435365144, 219088073110, 5750051401712, 1397876167796318, 53808016711020432

Offset

2,1

Links

Table of n, a(n) for n=2..15.

Crossrefs

Sequence in context: A071147 A156481 A176726 * A156473 A156504 A340545

Adjacent sequences: A156449 A156450 A156451 * A156453 A156454 A156455

Keyword

nonn

Author

R. H. Hardin Feb 09 2009

Status

approved