Polynexus numbers of order 8.

Terms

a(0) =0a(1) =1a(2) =25a(3) =234a(4) =1290a(5) =5115a(6) =16211a(7) =43700a(8) =104244a(9) =226005a(10) =453805a(11) =855646a(12) =1530750a(13) =2619279a(14) =4313895a(15) =6873320a(16) =10638056a(17) =16048425a(18) =23665089a(19) =34192210a(20) =48503410a(21) =67670691a(22) =92996475a(23) =126048924a(24) =168700700a(25) =223171325a(26) =292073301a(27) =378462150a(28) =485890534a(29) =618466615