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A121006 as a simple table

n a(n)
0 1
1 4
2 22
3 21
4 539
5 2653
6 13397
7 66556
8 66842
9 1666188
10 8347736
11 41679894
12 208607482
13 208458902
14 1042829398
15 5212208021
16 26068111639
17 130314629237
18 26066746957
19 3257989916987
20 16291262409019

[1,4,22,21,539,2653,13397,66556,66842,1666188,
 8347736,41679894,208607482,208458902,1042829398,
 5212208021,26068111639,130314629237,26066746957,
 3257989916987,16291262409019]

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Last modified April 19 08:20 EDT 2024. Contains 371782 sequences. (Running on oeis4.)