# A000767 (b-file synthesized from sequence entry) 2 16 3 192 4 2016 5 20160 6 197940 7 1930944 8 18805488 9 183156320 10 1785303660 11 17421627280 12 170214459928 13 1665089608504 14 16307758577692 15 159896665015064