A285180 Normalized number of n^2 X n^2 Sudokus.

1, 1, 12, 18383222420692992

Offset

0,3

Comments

Equals A107739(n)/((n^2)!).

Note that although the two Yordzhev papers have similar titles, they are different papers.

Links

Table of n, a(n) for n=0..3.

Krasimir Yordzhev, On the Number of Disjoint Pairs of S-permutation Matrices, arXiv:12112:1628 [math.CO], 2012.

Krasimir Yordzhev, On the number of mutually disjoint pairs of S-permutation matrices, Discrete Mathematics 340 (2017) 1442-1448.

Crossrefs

Cf. A107739, A285178, A285179.

Sequence in context: A175906 A144546 A165970 * A081357 A127708 A094896

Adjacent sequences: A285177 A285178 A285179 * A285181 A285182 A285183

Keyword

nonn,more

Author

N. J. A. Sloane, Apr 14 2017

Status

approved