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A187995 as a simple table

n a(n)
1 1
2 3
3 4
4 17
5 45
6 176
7 644
8 2983
9 13675
10 67487
11 340192
12 1775300
13 9438436
14 51112686
15 281006680
16 1565898705
17 8826775421

[1,3,4,17,45,176,644,2983,13675,67487,340192,
 1775300,9438436,51112686,281006680,1565898705,
 8826775421]

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Last modified November 26 20:36 EST 2021. Contains 349343 sequences. (Running on oeis4.)