# A009344 (b-file synthesized from sequence entry) 0 0 1 2 2 -20 3 512 4 -27680 5 2565632 6 -363299840 7 72957489152 8 -19722824192000 9 6905862783107072 10 -3040352844189532160 11 1643816046204280635392 12 -1070739118373698870968320 13 827017799903621162951770112