# A126567 (b-file synthesized from sequence entry) 0 1 1 2 2 5 3 14 4 42 5 132 6 430 7 1444 8 4981 9 17594 10 63441 11 232806 12 866870 13 3266460 14 12426210 15 47629020 16 183638729 17 711285170 18 2764753405 19 10775740030 20 42086252770 21 164635420788 22 644811687734 23 2527808259668 24 9916569410301 25 38923511495402 26 152841133694345 27 600349070362454