# A013469 (b-file synthesized from sequence entry) 0 1 1 -2 2 12 3 -122 4 1792 5 -35282 6 889152 7 -27747722 8 1045556992 9 -46640267042 10 2424156352512 11 -144890071612442 12 9849171061952512 13 -754330752297972722 14 64566114865428283392