# A012224 (b-file synthesized from sequence entry) 0 1 1 -6 2 184 3 -13584 4 1840768 5 -397140224 6 124961670144 7 -54024939321344 8 30732245464219648 9 -22258174840910315520 10 20000813079319781048320 11 -21837489688957057049821184 12 28476242253811580631861166080