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A002116
as a simple table
n
a(n)
0
2
1
20
2
402
3
14440
4
825502
5
69055260
6
7960285802
7
1209873973712
[2,20,402,14440,825502,69055260,7960285802, 1209873973712]
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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)
