# A111977 (b-file synthesized from sequence entry) 0 1 1 2 2 4 3 13 4 57 5 369 6 3681 7 59073 8 1579393 9 72188673 10 5749089793 11 809616264193 12 204018868459521 13 92907742733348865 14 77097057406948106241 15 117413997231333438701569 16 330195264668839727287861249