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A123689
as a simple table
n
a(n)
1
0
2
2
3
4
4
10
5
16
6
26
7
32
8
46
9
60
10
74
11
88
12
108
13
124
14
146
15
172
16
194
17
216
18
248
19
276
20
308
[0,2,4,10,16,26,32,46,60,74,88,108,124,146,172, 194,216,248,276,308]