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A144193 Square array (5 X 5) read by rows. 2


%S 0,0,0,0,1,0,1,0,0,0,0,0,1,0,0,0,0,0,1,0,1,0,0,0,0

%N Square array (5 X 5) read by rows.

%C Permutation contributing to the determinant that gives the 5th value of the moebius function. Determinant of matrix is equal to -1. The array is symmetrical.

%H J. Davies, <a href="https://web.archive.org/web/20171111153945/http://juliusdavies.ca:80/andre/permutations.html">Permutation Calculator</a>

%H Herbert S. Wilf, <a href="https://arxiv.org/abs/math/0408263">The Redheffer matrix of a partially ordered set</a>, arXiv:math/0408263 [math.CO], 2004.

%e The array is:

%e 0,0,0,0,1

%e 0,1,0,0,0

%e 0,0,1,0,0

%e 0,0,0,1,0

%e 1,0,0,0,0

%Y Cf. A143104, A002033.

%K fini,full,nonn,tabf

%O 1,1

%A _Mats Granvik_, Sep 13 2008

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Last modified September 23 02:41 EDT 2021. Contains 347609 sequences. (Running on oeis4.)