# A149214 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 10 4 42 5 135 6 587 7 2117 8 9440 9 36222 10 164694 11 656791 12 3031172 13 12413214 14 57948607 15 241968630 16 1139741739 17 4830463288 18 22915599452 19 98276507899 20 468915380663 21 2030520732519 22 9734368014373 23 42492739197948 24 204517567273130 25 898863173003696 26 4340712959643123 27 19189286075324474