# A003301 (b-file synthesized from sequence entry) 0 1 1 2 2 8 3 496 4 9088 5 12032 6 12004352 7 4139008 8 51347456 9 378357612544 10 4097254359040 11 2921482158080 12 9353679601664 13 4929181267787776 14 5689554887507968 15 41627810786525052928 16 37882178449895849984