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A129834 as a simple table

n a(n)
1 0
2 0
3 1
4 3
5 9
6 23
7 171
8 475
9 1307
10 10245
11 28951
12 233099
13 664496
14 5442024
15 3109434694
16 218785948496 

[0,0,1,3,9,23,171,475,1307,10245,28951,233099,
 664496,5442024,3109434694,218785948496]

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Last modified September 4 15:15 EDT 2024. Contains 375683 sequences. (Running on oeis4.)