# A073525 (b-file synthesized from sequence entry) 0 1 1 2 2 5 3 15 4 51 5 187 6 716 7 2811 8 11204 9 45089 10 182636 11 743180 12 3034361 13 12420945 14 50946169 15 209296302 16 860941813 17 3545265139 18 14611979639 19 60268977054 20 248744871983 21 1027188978686 22 4243751316106 23 17539851091965 24 72519657462805 25 299930389183429 26 1240806275485094