# A149826 (b-file synthesized from sequence entry) 0 1 1 2 2 4 3 10 4 28 5 85 6 275 7 924 8 3161 9 11123 10 40356 11 148994 12 555317 13 2099039 14 8057473 15 31247345 16 122019881 17 480549169 18 1909455313 19 7638161881 20 30713415080 21 124209720711 22 505237712256 23 2064851613757 24 8472358195113 25 34907360687287 26 144413933270171 27 599556168765568 28 2496836471032115