A096734 a(n)=det(M_n) where M_n is the n X n matrix m(i,j)=1 if sigma(i+j) is even, 0 otherwise.

0, -1, -1, 2, 0, -2, -9, 9, -13, -40, 52, 16, 3, 3, -25, 150, 73, -119, 435, -409, -1479, -1526, 2783, -1065, -7623, -6534, -2961, 10905, -7625, -49205, 114044, -160163, -364571, 849751, 6638244, 936704, -19925924, 29919679, 44801693, 15691398, -78571565, 78004083, 152659515, -328585072

Offset

1,4

Links

Table of n, a(n) for n=1..44.

Prog

(PARI) for(n=1, 70, print1(matdet(matrix(n, n, i, j, if((-1)^(sigma(i+j))+1, 1, 0))), ", "))

Crossrefs

Sequence in context: A265607 A332628 A091518 * A220234 A038020 A211910

Adjacent sequences: A096731 A096732 A096733 * A096735 A096736 A096737

Keyword

easy,sign

Author

Benoit Cloitre, May 30 2002

Status

approved