Triangle read by rows: T(n,k) is the number of strongly connected directed multigraphs with loops, with n arcs and k vertices.

A139622

Triangle read by rows: T(n,k) is the number of strongly connected directed multigraphs with loops, with n arcs and k vertices.

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =1a(7) =6a(8) =4a(9) =1a(10) =1a(11) =10a(12) =19a(13) =6a(14) =1a(15) =1a(16) =19a(17) =73a(18) =59a(19) =9a(20) =1a(21) =1a(22) =28a(23) =208a(24) =350a(25) =138a(26) =12a(27) =1a(28) =1a(29) =44

External references