# A074655 (b-file synthesized from sequence entry) 0 1 1 2 2 14 3 186 4 2880 5 50450 6 952854 7 19003474 8 394394880 9 8439756660 10 185033201150 11 4137181680698 12 94020326259264 13 2166105078791446 14 50489825369325118 15 1188777328563863850 16 28236363841594782720 17 675879582290807439794 18 16289254212695836475436