Triangular array read by rows: T(n,k) is the number of partial functions on [n] with exactly k connected components, n>=0, 0<=k<=n.

A349950

Triangular array read by rows: T(n,k) is the number of partial functions on [n] with exactly k connected components, n>=0, 0<=k<=n.

Terms

    a(0) =1a(1) =0a(2) =2a(3) =0a(4) =5a(5) =4a(6) =0a(7) =26a(8) =30a(9) =8a(10) =0a(11) =206a(12) =283a(13) =120a(14) =16a(15) =0a(16) =2194a(17) =3360a(18) =1790a(19) =400a(20) =32a(21) =0a(22) =29352a(23) =48538a(24) =29835a(25) =8660a(26) =1200a(27) =64a(28) =0a(29) =472730

External references