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A181609 as a simple table

n a(n)
2 2
3 3
4 7
5 23
6 108
7 604
8 3980
9 30186
10 258969
11 2479441
12 26207604
13 303119227
14 3807956707
15 51633582121
16 751604592219
17 11690365070546
18 193492748067369
19 3395655743755865
20 62980031819261211
21 1230967683216803500

[2,3,7,23,108,604,3980,30186,258969,2479441,
 26207604,303119227,3807956707,51633582121,
 751604592219,11690365070546,193492748067369,
 3395655743755865,62980031819261211,
 1230967683216803500]

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Last modified April 17 21:22 EDT 2024. Contains 371767 sequences. (Running on oeis4.)