Triangle T(n,k): vertex labeled disconnected Goldstone diagrams with n interactions and k external potentials.

A328922

Triangle T(n,k): vertex labeled disconnected Goldstone diagrams with n interactions and k external potentials.

Terms

    a(0) =0a(1) =0a(2) =0a(3) =4a(4) =4a(5) =1a(6) =128a(7) =120a(8) =36a(9) =4a(10) =6432a(11) =5952a(12) =1920a(13) =288a(14) =18a(15) =494592a(16) =458880a(17) =154560a(18) =26400a(19) =2400a(20) =96a(21) =55027200a(22) =51448320a(23) =17832960a(24) =3279360a(25) =352800a(26) =21600a(27) =600a(28) =8455495680a(29) =7975296000

External references