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A204971 as a simple table

na(n)
1166
21001
31001
46086
510416
66086
736522
8107004
9107004
1036522
11219755
121085013
131858301
141085013
15219755
161323027
1711064389
1831837899
1931837899
2011064389
211323027
227962992
23112737183
24547910909
25916967622
26547910909
27112737183

[166,1001,1001,6086,10416,6086,36522,107004,
 107004,36522,219755,1085013,1858301,1085013,
 219755,1323027,11064389,31837899,31837899,
 11064389,1323027,7962992,112737183,547910909,
 916967622,547910909,112737183]