Number of non-vanishing Feynman diagrams of order 2n for the vacuum polarization (the proper two-point function of the photon) and for the self-energy (the proper two-point function of the electron) in quantum electrodynamics (QED).
A005412
Number of non-vanishing Feynman diagrams of order 2n for the vacuum polarization (the proper two-point function of the photon) and for the self-energy (the proper two-point function of the electron) in quantum electrodynamics (QED).
Terms
- a(0) =1a(1) =3a(2) =18a(3) =153a(4) =1638a(5) =20898a(6) =307908a(7) =5134293a(8) =95518278a(9) =1961333838a(10) =44069970348
External references
- oeis: A005412