# A304582 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 2 4 144 5 72 6 64800 7 1800 8 2822400 9 3175200 10 317520000 11 635040 12 11064936960 13 15367968 14 2545242860160 15 14609174580000 16 8310997094400 17 259718659200 18 24319016372851200 19 75058692508800 20 10838475198270720000 21 2389883781218693760 22 374701571140216320