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A018952 as a simple table

n a(n)
2 2
3 6
4 33
5 202
6 1042
7 6206
8 38572
9 252894
10 1685564
11 11367911
12 77773792
13 538226451
14 3755728475
15 26423241960
16 187316098603 

[2,6,33,202,1042,6206,38572,252894,1685564,
 11367911,77773792,538226451,3755728475,
 26423241960,187316098603]

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Last modified April 25 03:15 EDT 2024. Contains 371964 sequences. (Running on oeis4.)