Number of isomorphism classes of multigraphs representing particle interactions in phi-4-theory on n non-external vertices.
A387168
Number of isomorphism classes of multigraphs representing particle interactions in phi-4-theory on n non-external vertices.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =8a(4) =26a(5) =124a(6) =627a(7) =3794a(8) =25306a(9) =188746
External references
- oeis: A387168