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A153447 as a simple table

n a(n)
1 1
2 2
3 4
4 9
5 19
6 49
7 131
8 424
9 1652

[1,2,4,9,19,49,131,424,1652]

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Last modified January 23 21:17 EST 2019. Contains 319404 sequences. (Running on oeis4.)