# A159602 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 6 4 26 5 152 6 1202 7 12840 8 184060 9 3552960 10 92338448 11 3237738008 12 153574021372 13 9872941474544 14 862850471831896 15 102720981260693424 16 16701084112350547436 17 3715705202756433837504 18 1133547354784950481434016