# A308370 (b-file synthesized from sequence entry) 1 1 2 1 3 3 4 8 5 20 6 47 7 118 8 280 9 681 10 1640 11 3963 12 9523 13 23004 14 55377 15 133477 16 321597 17 775054 18 1867304 19 4499934 20 10842847 21 26127768 22 62958232 23 151708512 24 365562567 25 880881465 26 2122617010 27 5114772619 28 12324827128 29 29698572295 30 71563264162 31 172442689864 32 415527172616