# A097039 (b-file synthesized from sequence entry) 0 0 1 1 2 7 3 19 4 47 5 102 6 210 7 413 8 789 9 1473 10 2703 11 4892 12 8756 13 15529 14 27331 15 47791 16 83103 17 143810 18 247814 19 425445 20 727985 21 1241981 22 2113247 23 3587064 24 6075432 25 10269457 26 17326975 27 29185483 28 49083599 29 82429278 30 138244218 31 231565037