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A195157
as a simple table
n
a(n)
1
1
2
2
3
20
4
252
5
7403
6
421616
7
52543529
8
13657426873
9
7262057176754
[1,2,20,252,7403,421616,52543529,13657426873, 7262057176754]
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Last modified September 20 13:22 EDT 2024. Contains 376072 sequences. (Running on oeis4.)
