# A150102 (b-file synthesized from sequence entry) 0 1 1 2 2 6 3 19 4 68 5 253 6 999 7 4031 8 16832 9 71234 10 308196 11 1345995 12 5968751 13 26654817 14 120354765 15 546416902 16 2501408653 17 11501092852 18 53220182665 19 247147799936 20 1153562089284 21 5400134575069 22 25383337549661 23 119610506437455 24 565526212187322 25 2679497291925914 26 12731304784452926 27 60601368754167970