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A091638 as a simple table

n a(n)
1 4
2 22
3 136
4 903
5 6361
6 46545
7 354123
8 2761106
9 21925170
10 176544507
11 1437663500
12 11814853749
13 97837428598
14 815398741896

[4,22,136,903,6361,46545,354123,2761106,21925170,
 176544507,1437663500,11814853749,97837428598,
 815398741896]

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Last modified March 28 07:33 EDT 2024. Contains 371235 sequences. (Running on oeis4.)