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A220046 as a simple table

n a(n)
1 20
2 59
3 184
4 848
5 2902
6 9055
7 26963
8 76874
9 211179
10 561525
11 1448263
12 3632759
13 8883599
14 21227329
15 49658836
16 113914079
17 256565306
18 567974512
19 1237033071
20 2652919602
21 5606496287
22 11683870637
23 24026097363
24 48778338927
25 97822577971

[20,59,184,848,2902,9055,26963,76874,211179,
 561525,1448263,3632759,8883599,21227329,49658836,
 113914079,256565306,567974512,1237033071,
 2652919602,5606496287,11683870637,24026097363,
 48778338927,97822577971]

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Last modified October 3 10:58 EDT 2022. Contains 357231 sequences. (Running on oeis4.)