Triangular array T read by rows: T(n, k) = Sum_{i=0..2*n-2*k} binomial(2*n-2*k, i)*binomial(2*k, i)*(-1)^i, 0 <= k <= n.

A184879

Triangular array T read by rows: T(n, k) = Sum_{i=0..2*n-2*k} binomial(2*n-2*k, i)*binomial(2*k, i)*(-1)^i, 0 <= k <= n.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =-2a(5) =1a(6) =1a(7) =-1a(8) =-1a(9) =1a(10) =1a(11) =4a(12) =6a(13) =4a(14) =1a(15) =1a(16) =13a(17) =2a(18) =2a(19) =13a(20) =1a(21) =1a(22) =26a(23) =-17a(24) =-20a(25) =-17a(26) =26a(27) =1a(28) =1a(29) =43

External references