# A013175 (b-file synthesized from sequence entry) 0 2 1 -8 2 80 3 -4160 4 177920 5 -25548800 6 2560563200 7 -702660608000 8 129295622144000 9 -57197188186112000 10 16886573106790400000 11 -10912577096233779200000 12 4743735379760119808000000