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A079453
as a simple table
n
a(n)
1
1
2
1
3
2
4
6
5
19
6
87
7
454
8
3006
9
23509
10
220102
11
2450511
12
32773345
13
532120179
[1,1,2,6,19,87,454,3006,23509,220102,2450511, 32773345,532120179]