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A269600 as a simple table

n a(n)
1 2
2 9
3 60
4 572
5 7030
6 105892
7 1886252
8 38768412
9 902743646
10 23482784400
11 674804472216
12 21227322458468
13 725465523386294
14 26765145874993234
15 1060182321437102136
16 44874027105660248520
17 2021234030434596074938

[2,9,60,572,7030,105892,1886252,38768412,
 902743646,23482784400,674804472216,21227322458468,
 725465523386294,26765145874993234,
 1060182321437102136,44874027105660248520,
 2021234030434596074938]

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)