Number of simple directed graphs on n labeled nodes consisting only of some cycle graphs C_2 and nodes not part of a cycle having directed edges to both nodes in exactly one cycle.
A133189
Number of simple directed graphs on n labeled nodes consisting only of some cycle graphs C_2 and nodes not part of a cycle having directed edges to both nodes in exactly one cycle.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =3a(4) =9a(5) =40a(6) =210a(7) =1176a(8) =7273a(9) =49932a(10) =372060a(11) =2971540a(12) =25359411a(13) =230364498a(14) =2215550428a(15) =22460391240a(16) =239236043985
External references
- oeis: A133189