Triangle, read by rows, T(n, k) = ((n-k)/(n+k))*binomial(n+k, n) + (k/(2*n-k))*binomial(2*n -k, n), with T(0,0) = 1.

A156006

Triangle, read by rows, T(n, k) = ((n-k)/(n+k))*binomial(n+k, n) + (k/(2*n-k))*binomial(2*n -k, n), with T(0,0) = 1.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =1a(7) =4a(8) =4a(9) =1a(10) =1a(11) =8a(12) =10a(13) =8a(14) =1a(15) =1a(16) =18a(17) =23a(18) =23a(19) =18a(20) =1a(21) =1a(22) =47a(23) =56a(24) =56a(25) =56a(26) =47a(27) =1a(28) =1a(29) =138

External references