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A096733
a(n)=det(M_n) where M_n is the n X n matrix m(i,j)=1 if sigma(i+j) is odd, 0 otherwise.
0
1, 1, -1, -1, 0, 1, -5, -4, -3, 13, 16, -5, 1, -1, -8, -48, 32, 39, 99, 78, -307, 333, 603, -35, -1068, 936, -444, -1619, -595, 5104, 10604, 14864, -35275, -78279, 803467, -126148, -2444027, -3581861, 5584811, -2343023, -8951803, -8296504, 16962643, 27724933, 53665144, -86430004, -463924640
OFFSET
1,7
PROG
(PARI) for(n=1, 70, print1(matdet(matrix(n, n, i, j, if((-1)^(sigma(i+j))+1, 0, 1))), ", "))
CROSSREFS
Sequence in context: A154198 A086793 A070515 * A125900 A019102 A019179
KEYWORD
easy,sign
AUTHOR
Benoit Cloitre, May 30 2002
STATUS
approved