# A012687 (b-file synthesized from sequence entry) 0 1 1 0 2 -12 3 480 4 -18480 5 176640 6 149396544 7 -38742692352 8 6743113079040 9 -363222941859840 10 -455485254371044352 11 322516524038804660224 12 -135316725169663246512128 13 19655917963465137568481280