# A012553 (b-file synthesized from sequence entry) 0 1 1 0 2 -12 3 -360 4 -4592 5 866880 6 144205248 7 10276506240 8 -1972062209792 9 -1066588240250880 10 -219129099375885312 11 33054966279836497920 12 54554661987210721497088 13 24677742880461438548951040