# A177594 (b-file synthesized from sequence entry) 0 1 1 1 2 6 3 90 4 2520 5 113400 6 7484400 7 681040081 8 81715496353 9 12500505087678 10 2374643401938450 11 548423992273068450 12 151329242873227786290 13 49169594830177508466780 14 18581179389079670034395725 15 8080585890092465008705929001 16 4006831811683726939901512184106