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A102954 as a simple table

n a(n)
1 3
2 9
3 15
4 21
5 27
6 87
7 180
8 1941
9 3960
10 4995
11 8577
12 23481
13 27855
14 80595

[3,9,15,21,27,87,180,1941,3960,4995,8577,23481,
 27855,80595]

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Last modified March 21 12:09 EDT 2019. Contains 321369 sequences. (Running on oeis4.)