Triangle read by rows, T(n,k) = T(n-1,k-1) + k*T(n-1,k) + (k+1)*T(n-1,k+1), T(0,0) = 1, n >= 0, k >= 0.

A217537

Triangle read by rows, T(n,k) = T(n-1,k-1) + k*T(n-1,k) + (k+1)*T(n-1,k+1), T(0,0) = 1, n >= 0, k >= 0.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =4a(8) =3a(9) =1a(10) =4a(11) =11a(12) =13a(13) =6a(14) =1a(15) =11a(16) =41a(17) =55a(18) =35a(19) =10a(20) =1a(21) =41a(22) =162a(23) =256a(24) =200a(25) =80a(26) =15a(27) =1a(28) =162a(29) =715

External references