A261815 Total number of semimagic squares of order n that can be formed from the numbers 1, ..., n^2.

1, 0, 72, 549504, 4632344409600

Offset

1,3

Links

Table of n, a(n) for n=1..5.

Wikipedia, Magic graph

Index entries for sequences related to magic squares

Formula

a(n) = A261816(n)*A048617(n) for n > 1.

Crossrefs

Cf. A006052, A048617, A261816.

Sequence in context: A135320 A135427 A028671 * A159440 A308586 A113889

Adjacent sequences: A261812 A261813 A261814 * A261816 A261817 A261818

Keyword

nonn,hard,more

Author

Arkadiusz Wesolowski, Nov 18 2015

Status

approved