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A257187 as a simple table

n a(n)
1 639228
2 4613955
3 57766489
4 916707473
5 13584142368
6 209357338632
7 3329338589296
8 52183619444529
9 815552990856702
10 12820383787282287
11 201368323746925262
12 3158998987149180769
13 49589358799802401415

[639228,4613955,57766489,916707473,13584142368,
 209357338632,3329338589296,52183619444529,
 815552990856702,12820383787282287,
 201368323746925262,3158998987149180769,
 49589358799802401415]

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Last modified September 18 13:54 EDT 2021. Contains 347527 sequences. (Running on oeis4.)