Consider the family of multigraphs enriched by the species of mod-6 sets. Sequence gives number of those multigraphs with 6n loops and arcs.

A099690

Consider the family of multigraphs enriched by the species of mod-6 sets. Sequence gives number of those multigraphs with 6n loops and arcs.

Terms

    a(0) =1a(1) =2a(2) =6008a(3) =463376006

External references