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A027912 as a simple table

n a(n)
2 1
3 5
4 28
5 156
6 880
7 5005
8 28665
9 165104
10 955434
11 5550755
12 32355917
13 189147400
14 1108476720
15 6510243495
16 38308997100
17 225810489168
18 1333057076890 

[1,5,28,156,880,5005,28665,165104,955434,5550755,
 32355917,189147400,1108476720,6510243495,
 38308997100,225810489168,1333057076890]

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Last modified April 18 18:58 EDT 2024. Contains 371781 sequences. (Running on oeis4.)