Triangle read by rows, T(n, k) = (n-k)*T(n-1, k-1) + k*T(n-1, k+1) except that T(n, k) = 0 if k<1 or k>n and T(n, n) = 1, for n>=0 and 0<=k<=n.
A272774
Triangle read by rows, T(n, k) = (n-k)*T(n-1, k-1) + k*T(n-1, k+1) except that T(n, k) = 0 if k<1 or k>n and T(n, n) = 1, for n>=0 and 0<=k<=n.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =0a(4) =0a(5) =1a(6) =0a(7) =1a(8) =0a(9) =1a(10) =0a(11) =0a(12) =4a(13) =0a(14) =1a(15) =0a(16) =4a(17) =0a(18) =11a(19) =0a(20) =1a(21) =0a(22) =0a(23) =38a(24) =0a(25) =26a(26) =0a(27) =1a(28) =0a(29) =38
External references
- oeis: A272774