# A009176 (b-file synthesized from sequence entry) 0 1 1 0 2 -12 3 -216 4 -5296 5 -168128 6 -5391680 7 38412672 8 61881368832 9 16576603568128 10 4120672559178752 11 1085659391947229184 12 313198080458495610880 13 99633528964523733598208 14 34860299883730859703910400