A081262 Number of distinct (modulo rotation and reflection) n X n associative magic squares.

1, 0, 1, 48, 48544, 0, 1125154039419854784

Offset

1,4

Links

Table of n, a(n) for n=1..7.

Go Kato, Shin-ichi Minato, Enumeration of associative magic squares of order 7, arXiv:1906.07461 [math.CO], 2019.

Walter Trump, How many magic squares are there?

Eric Weisstein's World of Mathematics, Associative Magic Square

Crossrefs

Cf. A006052, A081263.

Sequence in context: A345646 A292516 A006070 * A340186 A238001 A228143

Adjacent sequences: A081259 A081260 A081261 * A081263 A081264 A081265

Keyword

nonn,hard,more

Author

Eric W. Weisstein, Mar 14 2003

Extensions

a(5) from Jud McCranie, Mar 17 2003

a(6) from Max Alekseyev, May 22 2008

a(7) from Go Kato, Nov 30 2018

Status

approved