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A073591 as a simple table

n a(n)
0 2
1 3
2 6
3 17
4 66
5 327
6 1958
7 13701
8 109602
9 986411
10 9864102
11 108505113
12 1302061346
13 16926797487
14 236975164806
15 3554627472077
16 56874039553218
17 966858672404691
18 17403456103284422
19 330665665962404001
20 6613313319248080002

[2,3,6,17,66,327,1958,13701,109602,986411,9864102,
 108505113,1302061346,16926797487,236975164806,
 3554627472077,56874039553218,966858672404691,
 17403456103284422,330665665962404001,
 6613313319248080002]

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Last modified March 8 00:38 EST 2021. Contains 341934 sequences. (Running on oeis4.)