# A006074 (b-file synthesized from sequence entry) 1 1 2 3 3 4 4 14 5 30 6 107 7 318 8 1116 9 3743 10 13240 11 46476 12 166358 13 596638 14 2158829 15 7839845 16 28616815 17 104814161 18 385269397 19 1420242629 20 5249877583 21 19452536934 22 72237904034