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A057867 as a simple table

na(n)
1180
256700
3425675250
4390769879500
521438612514068750
61211517431782539131250
73952575621190533915703125
828870481903812321637757079687500

[180,56700,425675250,390769879500,
 21438612514068750,1211517431782539131250,
 3952575621190533915703125,
 28870481903812321637757079687500]