# A012450 (b-file synthesized from sequence entry) 1 2 2 0 3 40 4 -2688 5 210208 6 -13038080 7 2241915520 8 -589026013184 9 146361182839296 10 -42690102749216768 11 18963982821764573184 12 -10109322351828827471872 13 5702647873782168851521536