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A009609 as a simple table

n a(n)
0 0
1 2
2 4
3 182
4 4744
5 287402
6 21494284
7 2264343902
8 304602955024
9 51600721945682
10 10697629642233364
11 2665265431805294342
12 785147451273373098904
13 269855118987322780537082
14 106983136938538203343804444
15 48443492657600381889310646702

[0,2,4,182,4744,287402,21494284,2264343902,
 304602955024,51600721945682,10697629642233364,
 2665265431805294342,785147451273373098904,
 269855118987322780537082,
 106983136938538203343804444,
 48443492657600381889310646702]

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Last modified July 21 06:08 EDT 2024. Contains 374463 sequences. (Running on oeis4.)