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A228756 as a simple table

n a(n)
1 8
2 21
3 168
4 780
5 4599
6 24246
7 134440
8 728537
9 3988862
10 21739002
11 118720559
12 647758554
13 3535719686
14 19295840383
15 105313615878
16 574764393110
17 3136909949941
18 17120293581344
19 93437607513222
20 509954720089427

[8,21,168,780,4599,24246,134440,728537,3988862,
 21739002,118720559,647758554,3535719686,
 19295840383,105313615878,574764393110,
 3136909949941,17120293581344,93437607513222,
 509954720089427]

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Last modified July 15 19:24 EDT 2024. Contains 374334 sequences. (Running on oeis4.)