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A186337
as a simple table
n
a(n)
1
4
2
10
3
39
4
185
5
417
6
589
7
8351
8
40181
9
50809
10
69195
11
2614377
12
4044299
13
27691722
14
110046335
15
473061053
[4,10,39,185,417,589,8351,40181,50809,69195, 2614377,4044299,27691722,110046335,473061053]