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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 October 15 04:33 EDT 2019. Contains 328026 sequences. (Running on oeis4.)