Coefficient of x in the reduction by x^2->x+1 of the polynomial p(n,x)=(x+2)(x+4)...(x+2n).

A192940

Coefficient of x in the reduction by x^2->x+1 of the polynomial p(n,x)=(x+2)(x+4)...(x+2n).

Terms

    a(0) =0a(1) =1a(2) =7a(3) =58a(4) =583a(5) =6959a(6) =96510a(7) =1527125a(8) =27170285a(9) =537109100a(10) =11682187715a(11) =277285358845

External references