# A093175 (b-file synthesized from sequence entry) 1 1 2 4 3 9 4 16 5 30 6 59 7 114 8 219 9 422 10 814 11 1569 12 3024 13 5829 14 11236 15 21658 16 41747 17 80470 18 155111 19 298986 20 576314 21 1110881 22 2141292 23 4127473 24 7955960 25 15335606 26 29560331 27 56979370 28 109831267 29 211706574 30 408077542 31 786594753 32 1516210136 33 2922589005