# A131322 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 5 4 12 5 23 6 51 7 103 8 221 9 456 10 965 11 2009 12 4227 13 8833 14 18540 15 38803 16 81363 17 170399 18 357145 19 748176 20 1567849 21 3284833 22 6883059 23 14421533 24 30218028 25 63314735 26 132664227 27 277968871 28 582428789 29 1220356440 30 2557009709