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A078538
as a simple table
n
a(n)
1
12
2
22
3
12
4
249
5
12
6
22
7
12
8
19689
9
12
10
22
11
12
12
249
13
12
14
22
15
12
[12,22,12,249,12,22,12,19689,12,22,12,249,12,22, 12]