# A067352 (b-file synthesized from sequence entry) 1 2 2 2 3 7 4 30 5 158 6 985 7 7089 8 57890 9 529276 10 5358915 11 59543495 12 720476284 13 9431689530 14 132829627541 15 2002662076765 16 32185640519430 17 549301598198264 18 9921760117456135 19 189097075179752211 20 3792446896660586000 21 79840987298117599990 22 1760493769923493079769 23 40575189744903364314665