# A067050 (b-file synthesized from sequence entry) 0 1 1 1 2 1 3 3 4 2 5 1 6 6 7 60 8 6 9 1 10 10 11 3024 12 12600 13 24 14 1 15 15 16 240240 17 2874009600 18 38102400 19 120 20 1 21 21 22 27907200 23 129470223826944000 24 159950125679984640000 25 2112397056000 26 720 27 1 28 28 29 4475671200 30 1754345199379977566208000000