# A001686 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 3 4 8 5 51 6 1538 7 599871 8 19417825808 9 1573273218577214751 10 124442887685693556895657990772138 11 311057821480221188367831306672353513246409033360367599771