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A091642 as a simple table

n a(n)
1 4
2 23
3 141
4 915
5 6375
6 46799
7 355805
8 2774348
9 22023132
10 177273427
11 1443074791
12 11855541525
13 98146301284
14 817786989282

[4,23,141,915,6375,46799,355805,2774348,22023132,
 177273427,1443074791,11855541525,98146301284,
 817786989282]

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Last modified April 25 05:18 EDT 2024. Contains 371964 sequences. (Running on oeis4.)