# A027236 (b-file synthesized from sequence entry) 0 1 1 3 2 8 3 23 4 55 5 149 6 339 7 889 8 1966 9 5059 10 10985 11 27939 12 59898 13 151210 14 321155 15 806806 16 1701347 17 4260511 18 8933737 19 22325426 20 46600476 21 116300505 22 241846731 23 603086027 24 1250175771 25 3116094702 26 6442311137 27 16054097455 28 33114584924