# A366751 (b-file synthesized from sequence entry) 0 0 1 0 2 0 3 0 4 24 5 60 6 120 7 210 8 20496 9 181944 10 1059120 11 4990590 12 180292200 13 3191349876 14 36598884504 15 327837512730 16 7732754793120 17 194896185648240 18 3574721299186656 19 51311061420097014 20 1105883184455171640 21 32127696556638165420 22 812811279492629700360