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A236722 as a simple table

n a(n)
1 211
2 639
3 1956
4 6469
5 21829
6 76632
7 274715
8 1011801
9 3796026
10 14529341
11 56433065
12 222377312
13 885798875
14 3563873289
15 14447284384
16 58961418181
17 241865432945
18 996575390514
19 4120372173019
20 17085797687833
21 71011622830256

[211,639,1956,6469,21829,76632,274715,1011801,
 3796026,14529341,56433065,222377312,885798875,
 3563873289,14447284384,58961418181,241865432945,
 996575390514,4120372173019,17085797687833,
 71011622830256]

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Last modified August 5 05:22 EDT 2020. Contains 336209 sequences. (Running on oeis4.)