# A035355 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 2 4 5 5 15 6 44 7 140 8 442 9 1443 10 4751 11 15903 12 53716 13 183334 14 630513 15 2184417 16 7614318 17 26690344 18 94015908 19 332639104 20 1181596784 21 4212424485 22 15066677338 23 54050993664 24 194438337125 25 701224890628 26 2534810109024