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A281535 as a simple table

n a(n)
1 0
2 4
3 290
4 2919
5 14561
6 63840
7 245037
8 871492
9 2953605
10 9666482
11 30769771
12 95835530
13 293254847
14 884195974
15 2632901317
16 7756881944
17 22642414159
18 65560614848
19 188478504627
20 538421898582
21 1529377862437
22 4321992091946

[0,4,290,2919,14561,63840,245037,871492,2953605,
 9666482,30769771,95835530,293254847,884195974,
 2632901317,7756881944,22642414159,65560614848,
 188478504627,538421898582,1529377862437,
 4321992091946]

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Last modified August 22 05:29 EDT 2024. Contains 375356 sequences. (Running on oeis4.)