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A074920
as a simple table
n
a(n)
1
1
2
2
3
3
4
4
5
33
6
39
7
99
8
3237
9
9711
10
2069301
11
6207903
12
45502509
13
24091595067
[1,2,3,4,33,39,99,3237,9711,2069301,6207903, 45502509,24091595067]