# A149942 (b-file synthesized from sequence entry) 0 1 1 2 2 5 3 15 4 49 5 172 6 627 7 2364 8 9178 9 36322 10 146349 11 598798 12 2479100 13 10377197 14 43854651 15 186810219 16 801663799 17 3462831008 18 15043186516 19 65697663852 20 288296368358 21 1270513998501 22 5621498699217 23 24963796571708 24 111226042313882 25 497111195713677 26 2228180310648286 27 10013702555716602