A156482 Number of n X n arrays of squares of integers, symmetric about main diagonal, with all rows summing to 25.

1, 4, 16, 142, 2832, 250472, 46559350, 70028916760, 424743527181996, 5415473412421080256

Offset

1,2

Links

Table of n, a(n) for n=1..10.

Crossrefs

Sequence in context: A195899 A362143 A358289 * A335832 A173346 A319166

Adjacent sequences: A156479 A156480 A156481 * A156483 A156484 A156485

Keyword

nonn

Author

R. H. Hardin Feb 09 2009

Status

approved