A069641 - OEIS

A069641

Let M_n be the n X n matrix with M_n(i,j)=1/(i+j+2); then a(n)=1/det(M_n).

%I #5 Mar 30 2012 18:38:57

%S 4,600,2116800,149361408000,195185487974400000,

%T 4526188681429365350400000,1814098233992362204186460160000000,

%U 12350461816416310792905806186828267520000000

%N Let M_n be the n X n matrix with M_n(i,j)=1/(i+j+2); then a(n)=1/det(M_n).

%o (PARI) for(n=1,10,print1(1/matdet(matrix(n,n,i,j,1/(i+j+2))),","))

%K easy,nonn

%O 1,1

%A _Benoit Cloitre_, Apr 21 2002