# A001928 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 6 4 21 5 94 6 512 7 3485 8 29515 9 314474 10 4255727 11 73831813 12 1653083021 13 47941962135 14 1803010446411 15 87882300251730 16 5543501326580737