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A080042 as a simple table

n a(n)
0 2
1 4
2 22
3 100
4 466
5 2164
6 10054
7 46708
8 216994
9 1008100
10 4683382
11 21757828
12 101081458
13 469599316
14 2181641638
15 10135364500
16 47086382914
17 218751625156
18 1016265649366
19 4721317472932
20 21934066839826
21 101900219778100

[2,4,22,100,466,2164,10054,46708,216994,1008100,
 4683382,21757828,101081458,469599316,2181641638,
 10135364500,47086382914,218751625156,
 1016265649366,4721317472932,21934066839826,
 101900219778100]

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)