A156416 Number of 14 X 14 arrays of squares of integers, symmetric about both diagonal and antidiagonal, with all rows summing to n.

1, 6512, 4086600, 509911008, 18944759304, 266388662656, 1840450801838, 10754086795840, 75157230205402, 399699792848864, 1397876167796318, 4499416656998240, 18657442342135966, 66490911199244672, 164256548772296153

Offset

0,2

Links

Table of n, a(n) for n=0..14.

Crossrefs

Sequence in context: A284102 A338951 A251447 * A156418 A258521 A068270

Adjacent sequences: A156413 A156414 A156415 * A156417 A156418 A156419

Keyword

nonn

Author

R. H. Hardin, Feb 09 2009

Status

approved