# A148548 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 5 4 21 5 44 6 179 7 405 8 1835 9 4490 10 19779 11 49829 12 232721 13 610882 14 2788715 15 7427785 16 35253935 17 96368290 18 448865903 19 1237270005 20 5931202577 21 16649102672 22 78553909015 23 221640074309 24 1069716764575 25 3059624598509 26 14565629603329 27 41799007929725 28 202728660743415 29 588026037157535 30 2817795677054636