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A209338 as a simple table

n a(n)
1 1
2 3
3 4
4 15
5 40
6 146
7 514
8 2032
9 8076
10 33310
11 138966
12 589618
13 2525494
14 10923868
15 47599638
16 208824200
17 921391230
18 4086463748
19 18206487792 

[1,3,4,15,40,146,514,2032,8076,33310,138966,
 589618,2525494,10923868,47599638,208824200,
 921391230,4086463748,18206487792]

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Last modified April 23 06:45 EDT 2024. Contains 371906 sequences. (Running on oeis4.)