Feynman diagrams of order 2n with vertex skeletons.
A005414
Feynman diagrams of order 2n with vertex skeletons.
Terms
- a(0) =1a(1) =1a(2) =13a(3) =93a(4) =1245a(5) =18093a(6) =308605a(7) =5887453a(8) =124221373a(9) =2864305277a(10) =71589605885
External references
- oeis: A005414