A096733 - OEIS

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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.

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

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,7

LINKS

Table of n, a(n) for n=1..47.

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

Adjacent sequences: A096730 A096731 A096732 * A096734 A096735 A096736

KEYWORD

easy,sign

AUTHOR

Benoit Cloitre, May 30 2002

STATUS

approved