Number of non-vanishing Feynman diagrams of order 2n for the electron or the photon propagators in quantum electrodynamics.
A005411
Number of non-vanishing Feynman diagrams of order 2n for the electron or the photon propagators in quantum electrodynamics.
Terms
- a(0) =1a(1) =1a(2) =4a(3) =25a(4) =208a(5) =2146a(6) =26368a(7) =375733a(8) =6092032a(9) =110769550a(10) =2232792064a(11) =49426061818
External references
- oeis: A005411