Number of strongly connected directed multigraphs with loops allowed and with n arcs.
A139627
Number of strongly connected directed multigraphs with loops allowed and with n arcs.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =12a(5) =37a(6) =162a(7) =738a(8) =3928a(9) =22436a(10) =138716a(11) =911529a(12) =6339770a(13) =46336941a(14) =354453138a(15) =2826472249a(16) =23423053967a(17) =201179882629
External references
- oeis: A139627