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A137748 as a simple table

n a(n)
0 0
1 0
2 0
3 0
4 0
5 0
6 0
7 0
8 1
9 8
10 43
11 196
12 814
13 3188
14 12018
15 44178
16 159660
17 570262
18 2019964
19 7112774
20 24940259
21 87191430
22 304203350 

[0,0,0,0,0,0,0,0,1,8,43,196,814,3188,12018,44178,
 159660,570262,2019964,7112774,24940259,87191430,
 304203350]

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Last modified April 24 08:28 EDT 2024. Contains 371927 sequences. (Running on oeis4.)