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A243321
as a simple table
n
a(n)
1
1
2
1
3
1
4
3
5
5
6
16
7
41
8
158
9
582
10
2749
11
13852
12
80341
13
503582
14
3419670
15
24533162
16
184227017
[1,1,1,3,5,16,41,158,582,2749,13852,80341,503582, 3419670,24533162,184227017]