# A166886 (b-file synthesized from sequence entry) 1 1 2 2 3 9 4 62 5 593 6 7266 7 108720 8 1922166 9 39212154 10 906623004 11 23429034168 12 669203550906 13 20935080981744 14 711872134399868 15 26142553369667634 16 1031146768716808794 17 43475757877044427198 18 1951261759908828697902