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A297198 as a simple table

n a(n)
0 1
1 3
2 9
3 30
4 120
5 579
6 3282
7 21375

[1,3,9,30,120,579,3282,21375]

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Last modified March 21 07:23 EDT 2019. Contains 321367 sequences. (Running on oeis4.)