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A081006 as a simple table

n a(n)
1 2
2 20
3 143
4 986
5 6764
6 46367
7 317810
8 2178308
9 14930351
10 102334154
11 701408732
12 4807526975
13 32951280098
14 225851433716
15 1548008755919
16 10610209857722
17 72723460248140
18 498454011879263
19 3416454622906706
20 23416728348467684
21 160500643816367087

[2,20,143,986,6764,46367,317810,2178308,14930351,
 102334154,701408732,4807526975,32951280098,
 225851433716,1548008755919,10610209857722,
 72723460248140,498454011879263,3416454622906706,
 23416728348467684,160500643816367087]

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Last modified June 10 19:22 EDT 2024. Contains 373280 sequences. (Running on oeis4.)