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 B sequence (cf. A121867).

A121868

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 B sequence (cf. A121867).

Terms

    a(0) =0a(1) =-1a(2) =-1a(3) =0a(4) =5a(5) =23a(6) =74a(7) =161a(8) =-57a(9) =-3466a(10) =-27361a(11) =-155397a(12) =-687688a(13) =-1888525a(14) =4974059a(15) =134695952a(16) =1400820897a(17) =11055147275a(18) =70658948426a(19) =327448854237a(20) =223871274083

External references