Triangle read by rows: T(n,k) = number of vertex labeled connected Goldstone diagrams with n interactions and k external potentials.

A328921

Triangle read by rows: T(n,k) = number of vertex labeled connected Goldstone diagrams with n interactions and k external potentials.

Terms

    a(0) =1a(1) =2a(2) =1a(3) =20a(4) =8a(5) =1a(6) =592a(7) =240a(8) =36a(9) =2a(10) =33888a(11) =14208a(12) =2400a(13) =192a(14) =6a(15) =3134208a(16) =1355520a(17) =248640a(18) =24000a(19) =1200a(20) =24a(21) =423974400a(22) =188052480a(23) =36599040a(24) =3978240a(25) =252000a(26) =8640a(27) =120a(28) =78722795520a(29) =35613849600

External references