# A345132 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 10 4 46 5 252 6 1642 7 12316 8 104730 9 995122 10 10450414 11 120192924 12 1502537932 13 20285580880 14 294156077364 15 4559608340968 16 75236088623548 17 1316668510772124 18 24358939966126900 19 475008770990906488 20 9737844963832507656 21 209366721066736679536