OFFSET
1,7
COMMENTS
By moving the term in the lower right corner to the upper right corner and then calculating the determinant one gets the sequence 1,-1,-1,-1,-1,-1,-1,-1,... The contributing permutation matrices have the same signs as the contributing permutation matrices in the Möbius function determinant. It is conjectured that their number is A074206.
EXAMPLE
Table begins: 1; 1,1; 1,0,1; 2,1,0,1; 1,0,0,0,1; 3,1,1,0,0,1; 1,0,0,0,0,0,1; 4,2,0,1,0,0,0,1; 2,0,1,0,0,0,0,0,1; 3,1,0,0,1,0,0,0,0,1;
CROSSREFS
KEYWORD
nonn,tabl
AUTHOR
Mats Granvik, Dec 30 2008
STATUS
approved