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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

%I

%S 1,1,-1,-1,0,1,-5,-4,-3,13,16,-5,1,-1,-8,-48,32,39,99,78,-307,333,603,

%T -35,-1068,936,-444,-1619,-595,5104,10604,14864,-35275,-78279,803467,

%U -126148,-2444027,-3581861,5584811,-2343023,-8951803,-8296504,16962643,27724933,53665144,-86430004,-463924640

%N 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.

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

%K easy,sign

%O 1,7

%A _Benoit Cloitre_, May 30 2002

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Last modified June 26 06:36 EDT 2022. Contains 354877 sequences. (Running on oeis4.)