# A173139 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 4 4 11 5 31 6 97 7 309 8 1026 9 3466 10 11964 11 41856 12 148373 13 531233 14 1919313 15 6986745 16 25604367 17 94379887 18 349702606 19 1301729084 20 4865680876 21 18255350676 22 68724316775 23 259521249065 24 982796892300 25 3731493081316 26 14201727734640