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A078528
as a simple table
n
a(n)
7
1
8
1
9
2
10
5
11
15
12
30
13
76
14
170
15
422
16
961
17
2339
18
5390
19
12977
20
30059
21
71918
22
167019
23
397691
[1,1,2,5,15,30,76,170,422,961,2339,5390,12977, 30059,71918,167019,397691]