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A271415 as a simple table

n a(n)
0 1
1 4
2 32
3 160
4 736
5 3300
6 13612
7 55436
8 223632
9 898272
10 3599944
11 14409220
12 57665180
13 230683860
14 922867400
15 3691876012 

[1,4,32,160,736,3300,13612,55436,223632,898272,
 3599944,14409220,57665180,230683860,922867400,
 3691876012]

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Last modified August 11 05:51 EDT 2024. Contains 375059 sequences. (Running on oeis4.)