# A149036 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 10 4 35 5 126 6 495 7 1973 8 8009 9 33248 10 139542 11 592995 12 2548398 13 11028950 14 48080272 15 210957689 16 930544023 17 4125086990 18 18365051708 19 82072860679 20 368080787422 21 1656042383739 22 7472205409603 23 33804828156837 24 153307934411980 25 696826434016249 26 3173884743217481 27 14484245585420602