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A275505 as a simple table

n a(n)
1 12
2 56
3 232
4 988
5 4180
6 17712
7 75024
8 317812
9 1346268
10 5702888
11 24157816
12 102334156
13 433494436
14 1836311904
15 7778742048
16 32951280100
17 139583862444
18 591286729880
19 2504730781960
20 10610209857724
21 44945570212852

[12,56,232,988,4180,17712,75024,317812,1346268,
 5702888,24157816,102334156,433494436,1836311904,
 7778742048,32951280100,139583862444,591286729880,
 2504730781960,10610209857724,44945570212852]

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)