Eighth column (k=7) of septinomial array A063265.

Terms

a(0) =6a(1) =33a(2) =116a(3) =325a(4) =786a(5) =1709a(6) =3424a(7) =6426a(8) =11430a(9) =19437a(10) =31812a(11) =50375a(12) =77506a(13) =116265a(14) =170528a(15) =245140a(16) =346086a(17) =480681a(18) =657780a(19) =888009a(20) =1184018a(21) =1560757a(22) =2035776a(23) =2629550a(24) =3365830a(25) =4272021a(26) =5379588a(27) =6724491a(28) =8347650