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A207766 as a simple table

n a(n)
1 21
2 441
3 1087
4 6459
5 21547
6 56651
7 235872
8 862146
9 2629798
10 9529570
11 34708948
12 114255562
13 396908066
14 1416972222
15 4828733870
16 16634895736
17 58487207221
18 201993811973
19 696619145912
20 2429011369708
21 8423471768055
22 29119549204363

[21,441,1087,6459,21547,56651,235872,862146,
 2629798,9529570,34708948,114255562,396908066,
 1416972222,4828733870,16634895736,58487207221,
 201993811973,696619145912,2429011369708,
 8423471768055,29119549204363]

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Last modified November 28 23:48 EST 2021. Contains 349415 sequences. (Running on oeis4.)