# A035509 (b-file synthesized from sequence entry) 0 1 1 7 2 25 3 101 4 321 5 1075 6 3426 7 9958 8 30253 9 92735 10 253731 11 739303 12 2056915 13 5899304 14 17108660 15 46137324 16 130016549 17 370248450 18 993480845 19 2766546762 20 7510827752 21 20798505510 22 58123818148 23 155141346542 24 426530329383