Consider the family of directed multigraphs enriched by the species of endofunctions. Sequence gives number of those multigraphs with n labeled loops and arcs.
A099710
Consider the family of directed multigraphs enriched by the species of endofunctions. Sequence gives number of those multigraphs with n labeled loops and arcs.
Terms
- a(0) =1a(1) =2a(2) =21a(3) =372a(4) =9503a(5) =323528a(6) =13976119a(7) =740471952a(8) =46918236113
External references
- oeis: A099710