# A343666 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 5 4 15 5 52 6 202 7 870 8 4084 9 20727 10 112825 11 654546 12 4026487 13 26145511 14 178550986 15 1278168860 16 9564026947 17 74615547996 18 605593775899 19 5103054929621 20 44564754448972 21 402677613100491 22 3759094788129312 23 36205919126040190 24 359340174509911325 25 3670825700549853053