A285178 Number of n^2 X n^2 S-permutation matrices that are disjoint from a given one.

0, 7, 17972, 41685061617, 232152032603580176504, 7236273578711450275537707547657855

Offset

1,2

Comments

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

Links

Table of n, a(n) for n=1..6.

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, A285179, A285180.

Sequence in context: A115997 A013786 A351326 * A072050 A249765 A201037

Adjacent sequences: A285175 A285176 A285177 * A285179 A285180 A285181

Keyword

nonn,more

Author

N. J. A. Sloane, Apr 14 2017

Status

approved