# A068846 (b-file synthesized from sequence entry) 0 11 1 61 2 367 3 2161 4 12967 5 77761 6 466561 7 2799361 8 16796161 9 100776967 10 604661767 11 36279705641 12 217678233631 13 1306069401601 14 7836416409623 15 47018498457641 16 282110990745637 17 1692665944473601 18 1015599566684161