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A147420 as a simple table

n a(n)
1 1
2 1
3 1
4 1
5 1
6 9
7 23
8 64
9 295
10 1072
11 4637
12 27060
13 195073
14 1617157
15 15822995
16 190207942
17 2553434864
18 40752029560

[1,1,1,1,1,9,23,64,295,1072,4637,27060,195073,
 1617157,15822995,190207942,2553434864,40752029560]

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Last modified March 29 09:14 EDT 2024. Contains 371268 sequences. (Running on oeis4.)