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A030269 as a simple table

n a(n)
0 0
1 0
2 1
3 2
4 6
5 18
6 69
7 287
8 1397
9 7634
10 46972
11 321014
12 2416305
13 19840547
14 176267022
15 1681915809
16 17127587977
17 185127766583

[0,0,1,2,6,18,69,287,1397,7634,46972,321014,
 2416305,19840547,176267022,1681915809,17127587977,
 185127766583]

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Last modified April 17 04:44 EDT 2024. Contains 371756 sequences. (Running on oeis4.)