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A147119
as a simple table
n
a(n)
1
1
2
1
3
1
4
1
5
1
6
1
7
1
8
1
9
3
10
9
11
19
12
33
13
79
14
209
15
671
16
2175
17
8279
18
34581
19
151497
20
746481
21
3938933
22
23401293
[1,1,1,1,1,1,1,1,3,9,19,33,79,209,671,2175,8279, 34581,151497,746481,3938933,23401293]