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A207412 as a simple table

na(n)
10
20
30
40
50
60
71
86
957
10659
1110236
12204927
135231080
14166394885
156459372691

[0,0,0,0,0,0,1,6,57,659,10236,204927,5231080,
 166394885,6459372691]