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A130172
as a simple table
n
a(n)
1
2
2
4
3
2
4
62
5
221
6
301
7
1062
8
860
9
21189
10
35835
11
116119
12
317168
13
3000313
[2,4,2,62,221,301,1062,860,21189,35835,116119, 317168,3000313]