Triangle read by rows: T(n,k) = (n-1)*T(n-1,k) + T(n-2,k), with T(n,n-1)=1, T(n,n-2)=n-2, for n >= 1, 0 <= k <= n-1.

A228340

Triangle read by rows: T(n,k) = (n-1)*T(n-1,k) + T(n-2,k), with T(n,n-1)=1, T(n,n-2)=n-2, for n >= 1, 0 <= k <= n-1.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =1a(4) =1a(5) =1a(6) =3a(7) =4a(8) =2a(9) =1a(10) =13a(11) =17a(12) =9a(13) =3a(14) =1a(15) =68a(16) =89a(17) =47a(18) =16a(19) =4a(20) =1a(21) =421a(22) =551a(23) =291a(24) =99a(25) =25a(26) =5a(27) =1a(28) =3015a(29) =3946

External references