# A291648 (b-file synthesized from sequence entry) 1 1 2 2 3 4 4 9 5 19 6 45 7 105 8 261 9 657 10 1708 11 4498 12 12081 13 32752 14 89792 15 247893 16 689004 17 1924357 18 5398587 19 15197830 20 42917215 21 121507597 22 344806293 23 980423528 24 2792741331 25 7967842859 26 22765631866 27 65131178683 28 186560990191 29 53497417058 30 1535637252938