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A285178 Number of n^2 X n^2 S-permutation matrices that are disjoint from a given one. 3
0, 7, 17972, 41685061617, 232152032603580176504, 7236273578711450275537707547657855 (list; graph; refs; listen; history; text; internal format)
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: A134645 A115997 A013786 * A072050 A249765 A201037

Adjacent sequences:  A285175 A285176 A285177 * A285179 A285180 A285181

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, Apr 14 2017

STATUS

approved

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Last modified January 21 17:07 EST 2019. Contains 319350 sequences. (Running on oeis4.)