# A101484 (b-file synthesized from sequence entry) 0 1 1 2 2 3 3 7 4 33 5 285 6 3648 7 61306 8 1270440 9 31244205 10 888288960 11 28640745684 12 1032065614715 13 41087944243649 14 1790413981105727 15 84737880414848784 16 4327877295100145382 17 237218770042549151701 18 13887772416031152573506