A144198 - OEIS

%I #5 Mar 12 2015 23:15:53

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

%T 0,0,1,0,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0,0,1,0,1,0,0,0,0,0,0,0

%N Square array (8 X 8) read by rows.

%C Permutation contributing to the determinant that gives the 8th value of the Möbius function. Determinant of matrix is equal to -1. The array is symmetrical.

%H H. S. Wilf <a href="http://www.citebase.org/fulltext?format=application%2Fpdf&amp;identifier=oai%3AarXiv.org%3Amath%2F0408263">The Redheffer matrix of a partially ordered set</a>

%e The array is:

%e 0,0,0,0,0,0,0,1

%e 0,1,0,0,0,0,0,0

%e 0,0,1,0,0,0,0,0

%e 0,0,0,1,0,0,0,0

%e 0,0,0,0,1,0,0,0

%e 0,0,0,0,0,1,0,0

%e 0,0,0,0,0,0,1,0

%e 1,0,0,0,0,0,0,0

%Y Cf. A143104, A002033, A144197, A144199.

%K fini,full,nonn,tabf

%O 1,1

%A _Mats Granvik_, Sep 13 2008