# A075198 (b-file synthesized from sequence entry) 1 1 2 1 3 2 4 5 5 9 6 24 7 41 8 121 9 213 10 522 11 783 12 2712 13 3179 14 8672 15 16621 16 37415 17 48558 18 154660 19 185007 20 573296 21 876633 22 1759730 23 2606543 24 8768743 25 10774339