Irregular triangle read by rows: T(n,k) is the number of k-regular graphs on n labeled nodes with loops allowed, n >= 1, 0 <= k <= n + 1.

A333158

Irregular triangle read by rows: T(n,k) is the number of k-regular graphs on n labeled nodes with loops allowed, n >= 1, 0 <= k <= n + 1.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =1a(4) =1a(5) =1a(6) =1a(7) =1a(8) =0a(9) =2a(10) =0a(11) =1a(12) =1a(13) =3a(14) =8a(15) =8a(16) =3a(17) =1a(18) =1a(19) =0a(20) =38a(21) =0a(22) =38a(23) =0a(24) =1a(25) =1a(26) =15a(27) =208a(28) =730a(29) =730

External references