# A004791 (b-file synthesized from sequence entry) 1 2 2 6 3 7 4 20 5 148 6 403 7 1096 8 2980 9 8101 10 8102 11 8103 12 59874 13 442413 14 1202604 15 3269017 16 8886110 17 24154952 18 65659968 19 65659969 20 485165195 21 1318815734 22 3584912845 23 3584912846 24 9744803446 25 72004899336 26 72004899337 27 195729609428 28 532048240600