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A298049 as a simple table

n a(n)
1 0
2 3
3 15
4 40
5 121
6 512
7 1708
8 7014
9 35804
10 201703
11 1158266
12 7391098
13 54852360 

[0,3,15,40,121,512,1708,7014,35804,201703,1158266,
 7391098,54852360]

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Last modified October 4 12:48 EDT 2023. Contains 365881 sequences. (Running on oeis4.)