# A052603 (b-file synthesized from sequence entry) 0 1 1 1 2 8 3 78 4 984 5 15480 6 292320 7 6441120 8 162207360 9 4595512320 10 144662112000 11 5009199148800 12 189221439052800 13 7743449813299200 14 341258374762905600 15 16113703632009984000 16 811588993992032256000 17 43431603596770701312000