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A229536 as a simple table

n a(n)
1 0
2 20
3 58
4 361
5 1588
6 7460
7 33136
8 146300
9 634976
10 2729872
11 11628320
12 49175856
13 206658752
14 863838624
15 3594073792
16 14892589280
17 61487645824
18 253053701600
19 1038460551744
20 4250534994848
21 17357200322560
22 70727788661344

[0,20,58,361,1588,7460,33136,146300,634976,
 2729872,11628320,49175856,206658752,863838624,
 3594073792,14892589280,61487645824,253053701600,
 1038460551744,4250534994848,17357200322560,
 70727788661344]

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Last modified April 23 13:11 EDT 2024. Contains 371913 sequences. (Running on oeis4.)