# A354508 (b-file synthesized from sequence entry) 1 1 2 5 3 32 4 168 5 1189 6 8785 7 77384 8 646296 9 7306737 10 79997893 11 1005481784 12 12518370128 13 184109233125 14 2671256865121 15 47934480000112 16 754158322407248 17 13813898274148737 18 262680987222463269 19 5518034466415262320 20 107988236156057411096 21 2605128008760639636677