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A127947 as a simple table

na(n)
01
110
2500
3125000
4156250000
5976562500000
630517578125000000
74768371582031250000000
83725290298461914062500000000
914551915228366851806640625000000000

[1,10,500,125000,156250000,976562500000,
 30517578125000000,4768371582031250000000,
 3725290298461914062500000000,
 14551915228366851806640625000000000]