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A020570 as a simple table

n a(n)
0 1
1 21
2 295
3 3465
4 36751
5 365001
6 3463615
7 31794105
8 284628751
9 2499039081
10 21606842335
11 184519243545
12 1559982264751
13 13079717026761
14 108915112739455
15 901732722577785
16 7429565635164751
17 60963378722560041
18 498496565225842975
19 4064108629664292825
20 33049477950757248751

[1,21,295,3465,36751,365001,3463615,31794105,
 284628751,2499039081,21606842335,184519243545,
 1559982264751,13079717026761,108915112739455,
 901732722577785,7429565635164751,
 60963378722560041,498496565225842975,
 4064108629664292825,33049477950757248751]

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Last modified May 12 19:25 EDT 2024. Contains 372494 sequences. (Running on oeis4.)