Let A(0) = 1, B(0) = 0; A(n+1) = Sum_{k=0..n} binomial(n,k)*B(k), B(n+1) = Sum_{k=0..n} -binomial(n,k)*A(k); entry gives A sequence (cf. A121868).

A121867

Let A(0) = 1, B(0) = 0; A(n+1) = Sum_{k=0..n} binomial(n,k)*B(k), B(n+1) = Sum_{k=0..n} -binomial(n,k)*A(k); entry gives A sequence (cf. A121868).

Terms

    a(0) =1a(1) =0a(2) =-1a(3) =-3a(4) =-6a(5) =-5a(6) =33a(7) =266a(8) =1309a(9) =4905a(10) =11516a(11) =-22935a(12) =-556875a(13) =-4932512a(14) =-32889885a(15) =-174282151a(16) =-612400262a(17) =907955295a(18) =45283256165a(19) =573855673458

External references