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A153947 as a simple table

n a(n)
0 1
1 2
2 2
3 4
4 11
5 23
6 83
7 542
8 2154
9 15035
10 184615
11 1315991
12 16739106
13 377984235
14 5010747205
15 118406407922
16 4950057264228
17 123458500863829

[1,2,2,4,11,23,83,542,2154,15035,184615,1315991,
 16739106,377984235,5010747205,118406407922,
 4950057264228,123458500863829]

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Last modified February 25 13:12 EST 2024. Contains 370330 sequences. (Running on oeis4.)