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A320803 as a simple table

n a(n)
0 1
1 1
2 3
3 7
4 21
5 56
6 174
7 517
8 1664
9 5383
10 18199

[1,1,3,7,21,56,174,517,1664,5383,18199]

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Last modified July 10 00:25 EDT 2020. Contains 335570 sequences. (Running on oeis4.)