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Number of n^2 X n^2 S-permutation matrices that are disjoint from a given one.
3

%I #15 Apr 16 2017 04:52:36

%S 0,7,17972,41685061617,232152032603580176504,

%T 7236273578711450275537707547657855

%N Number of n^2 X n^2 S-permutation matrices that are disjoint from a given one.

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

%H Krasimir Yordzhev, <a href="https://arxiv.org/abs/1211.1628">On the Number of Disjoint Pairs of S-permutation Matrices</a>, arXiv:12112:1628 [math.CO], 2012.

%H Krasimir Yordzhev, <a href="http://doi.org/10.1016/j.disc.2016.09.011">On the number of mutually disjoint pairs of S-permutation matrices</a>, Discrete Mathematics 340 (2017) 1442-1448.

%Y Cf. A107739, A285179, A285180.

%K nonn,more

%O 1,2

%A _N. J. A. Sloane_, Apr 14 2017