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A201346
as a simple table
n
a(n)
1
0
2
4
3
18
4
191
5
4860
6
310036
7
53350918
8
26097731070
9
37211940860240
10
157260419809121989
[0,4,18,191,4860,310036,53350918,26097731070, 37211940860240,157260419809121989]
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Last modified April 25 10:51 EDT 2024. Contains 371967 sequences. (Running on oeis4.)