# A367101 (b-file synthesized from sequence entry) 0 1 1 2 2 4 3 14 4 42 5 168 6 696 7 2841 8 11421 9 50317 10 218277 11 923709 12 4043889 13 17416089 14 76253769 15 338014584 16 1469460024 17 6395962044 18 28367342244 19 123799554504 20 543903261384 21 2403339554904 22 10545287718864 23 46223487538464 24 203591793511992 25 893988182518176 26 3924601439423256