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A153936 as a simple table

n a(n)
0 1
1 2
2 4
3 13
4 26
5 65
6 226
7 1291
8 7132
9 55130
10 379228
11 4264780
12 44700351
13 743555327
14 11220972023
15 261784540652
16 5859844173065
17 202299825940682
18 6575351187836482 

[1,2,4,13,26,65,226,1291,7132,55130,379228,
 4264780,44700351,743555327,11220972023,
 261784540652,5859844173065,202299825940682,
 6575351187836482]

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Last modified June 3 22:46 EDT 2023. Contains 363116 sequences. (Running on oeis4.)