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A275780 as a simple table

n a(n)
0 1
1 1
2 2
3 4
4 12
5 43
6 160
7 668
8 3098
9 15465
10 83100
11 477651
12 2914505
13 18795814
14 127790544
15 911448954
16 6808162094 

[1,1,2,4,12,43,160,668,3098,15465,83100,477651,
 2914505,18795814,127790544,911448954,6808162094]

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Last modified April 16 12:05 EDT 2024. Contains 371711 sequences. (Running on oeis4.)