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A093185
as a simple table
n
a(n)
1
1
2
4
3
33
4
309
5
2805
6
25566
7
230989
8
2106529
9
19303539
10
177948527
11
1649241049
12
15360074924
13
143682925080
[1,4,33,309,2805,25566,230989,2106529,19303539, 177948527,1649241049,15360074924,143682925080]
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Last modified April 19 07:11 EDT 2024. Contains 371782 sequences. (Running on oeis4.)