# A149922 (b-file synthesized from sequence entry) 0 1 1 2 2 5 3 15 4 47 5 158 6 551 7 1978 8 7280 9 27287 10 103890 11 400726 12 1562935 13 6152911 14 24424119 15 97651753 16 392890089 17 1589751091 18 6465135718 19 26411296607 20 108341410515 21 446089923524 22 1843009043745 23 7638272615102 24 31747762868828 25 132306896027373 26 552742459514066 27 2314493115874922 28 9712068714424451