Number of non-vanishing Feynman diagrams of order 2n+1 for the electron-electron-photon proper vertex function in quantum electrodynamics (QED).

A005413

Number of non-vanishing Feynman diagrams of order 2n+1 for the electron-electron-photon proper vertex function in quantum electrodynamics (QED).

Terms

    a(0) =1a(1) =1a(2) =7a(3) =72a(4) =891a(5) =12672a(6) =202770a(7) =3602880a(8) =70425747a(9) =1503484416a(10) =34845294582a(11) =872193147840

External references