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A075531
as a simple table
n
a(n)
1
0
2
0
3
1
4
2
5
3
6
6
7
10
8
18
9
28
10
50
11
79
12
144
13
249
14
432
15
756
[0,0,1,2,3,6,10,18,28,50,79,144,249,432,756]