Array read by antidiagonals: A(n,k) = number of digraphs on n unlabeled nodes, arbitrarily colored with k given colors (n >= 1, k >= 1).
A329874
Array read by antidiagonals: A(n,k) = number of digraphs on n unlabeled nodes, arbitrarily colored with k given colors (n >= 1, k >= 1).
Terms
- a(0) =1a(1) =2a(2) =3a(3) =3a(4) =10a(5) =16a(6) =4a(7) =21a(8) =104a(9) =218a(10) =5a(11) =36a(12) =328a(13) =3044a(14) =9608a(15) =6a(16) =55a(17) =752a(18) =14814a(19) =291968a(20) =1540944a(21) =7a(22) =78a(23) =1440a(24) =45960a(25) =2183400a(26) =96928992a(27) =882033440a(28) =8a(29) =105
External references
- oeis: A329874