A156451 Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 10.

2, 6, 60, 972, 56610, 4465916, 541808498, 101930271184, 39015704748255, 40748977102642818

Offset

2,1

Links

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

Crossrefs

Sequence in context: A180402 A338600 A089039 * A152617 A156472 A108640

Adjacent sequences: A156448 A156449 A156450 * A156452 A156453 A156454

Keyword

nonn

Author

R. H. Hardin Feb 09 2009

Status

approved