A156488 Number of n X n arrays of squares of integers, symmetric under 90 degree rotation, with all rows summing to 28.

6, 0, 78, 163, 58704, 590400, 202480300, 9256081380, 4014312232560

Offset

4,1

Links

Table of n, a(n) for n=4..12.

Crossrefs

Sequence in context: A191688 A051767 A199044 * A057399 A245086 A365909

Adjacent sequences: A156485 A156486 A156487 * A156489 A156490 A156491

Keyword

nonn

Author

R. H. Hardin Feb 09 2009

Status

approved