# A331660 (b-file synthesized from sequence entry) 1 1 2 1 3 5 4 32 5 280 6 3280 7 49480 8 927560 9 21037640 10 566134160 11 17803754560 12 646052181520 13 26757321804880 14 1252934215973600 15 65791336312915520 16 3846554938702140320 17 248841434876849499040 18 17713758333248102781760 19 1380631354206969100115200