A144193 - OEIS

%I #14 Aug 07 2018 20:53:33

%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