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A000697 as a simple table

n a(n)
0 1
1 2
2 7
3 26
4 89
5 316
6 1243
7 5564
8 28321
9 162160
10 1032051
11 7226636
12 55206161
13 456886912
14 4072080587
15 38885496092
16 396084390849
17 4286637591872
18 49121248360291
19 594159600856332
20 7565074996215025
21 101137602761945440

[1,2,7,26,89,316,1243,5564,28321,162160,1032051,
 7226636,55206161,456886912,4072080587,38885496092,
 396084390849,4286637591872,49121248360291,
 594159600856332,7565074996215025,
 101137602761945440]

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Last modified February 23 21:23 EST 2018. Contains 299588 sequences. (Running on oeis4.)