# A024742 (b-file synthesized from sequence entry) 1 1 2 2 3 4 4 11 5 28 6 68 7 169 8 470 9 1276 10 3395 11 9016 12 25736 13 71785 14 197084 15 543136 16 1562987 17 4441888 18 12490268 19 35118241 20 102094436 21 293497252 22 836212259 23 2384733976 24 6972232316 25 20220310225 26 58240787582 27 167689305760 28 493029967907 29 1438787149228