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A269712 as a simple table

n a(n)
0 1
1 4
2 12
3 28
4 60
5 124
6 252
7 508
8 1020
9 2044
10 4092
11 8188
12 16380
13 32764
14 65532
15 131068 

[1,4,12,28,60,124,252,508,1020,2044,4092,8188,
 16380,32764,65532,131068]

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Last modified April 25 16:45 EDT 2024. Contains 371989 sequences. (Running on oeis4.)