# A068381 (b-file synthesized from sequence entry) 2 12 3 32 4 96 5 648 6 7736 7 228424 8 11974112 9 1599762776 10 382467306272 11 234367651907856 12 258981528765867728 13 733498025032488425464 14 3770347483688546402804760 15 49588653272896250824990166768