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A270717 as a simple table

n a(n)
0 1
1 8
2 40
3 184
4 821
5 3476
6 13729
7 55756
8 224073
9 899188
10 3598033
11 14415009
12 57653973
13 230694612
14 922702724
15 3690959937 

[1,8,40,184,821,3476,13729,55756,224073,899188,
 3598033,14415009,57653973,230694612,922702724,
 3690959937]

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Last modified September 9 10:11 EDT 2024. Contains 375764 sequences. (Running on oeis4.)