# A149882 (b-file synthesized from sequence entry) 0 1 1 2 2 5 3 14 4 43 5 147 6 523 7 1932 8 7289 9 28034 10 110057 11 438969 12 1774737 13 7252025 14 29898867 15 124323401 16 520995759 17 2198354226 18 9332207929 19 39825314924 20 170784974678 21 735750134895 22 3183012540969 23 13823368675382 24 60242473499159 25 263384312542091 26 1155038087890992 27 5079745113918977