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A057970 as a simple table

na(n)
11
28
354
4333
51896
69874
747164
8207112
9840323
103168506
1111170331
1237034409
13116095018
14345785753
15982835676
162676217504
177005306389
1817681946594
1943153532167
20102080966243
21234565062960
22524594120393
231143910860870

[1,8,54,333,1896,9874,47164,207112,840323,3168506,
 11170331,37034409,116095018,345785753,982835676,
 2676217504,7005306389,17681946594,43153532167,
 102080966243,234565062960,524594120393,
 1143910860870]