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A127405
as a simple table
n
a(n)
1
0
2
2
3
4
4
8
5
12
6
20
7
24
8
36
9
46
10
56
11
68
12
81
13
96
14
116
15
130
16
150
17
168
18
190
19
204
20
236
[0,2,4,8,12,20,24,36,46,56,68,81,96,116,130,150, 168,190,204,236]