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A207267 as a simple table

n a(n)
1 18
2 324
3 1014
4 3513
5 14184
6 45520
7 135686
8 417772
9 1253238
10 3651096
11 10647801
12 30923564
13 88853464
14 254267485
15 725590642
16 2060214105
17 5827339605
18 16437397037
19 46220378910
20 129590864085
21 362487844504
22 1011664530775
23 2817477642474

[18,324,1014,3513,14184,45520,135686,417772,
 1253238,3651096,10647801,30923564,88853464,
 254267485,725590642,2060214105,5827339605,
 16437397037,46220378910,129590864085,362487844504,
 1011664530775,2817477642474]

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Last modified July 6 14:10 EDT 2022. Contains 355110 sequences. (Running on oeis4.)