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A218209 as a simple table

n a(n)
1 2
2 1
3 3
4 4
5 12
6 31
7 86
8 230
9 681
10 1934
11 5634
12 15772 

[2,1,3,4,12,31,86,230,681,1934,5634,15772]

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Last modified April 16 01:40 EDT 2024. Contains 371696 sequences. (Running on oeis4.)