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A000375
as a simple table
n
a(n)
1
0
2
1
3
2
4
4
5
7
6
10
7
16
8
22
9
30
10
38
11
51
12
65
13
80
14
101
15
113
16
139
17
159
18
191
19
221
[0,1,2,4,7,10,16,22,30,38,51,65,80,101,113,139, 159,191,221]