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A295972
as a simple table
n
a(n)
1
5
2
6
3
18
4
27
5
48
6
51
7
92
8
396
9
678
10
1259
11
2085
12
2820
13
3009
14
4311
15
5015
16
7775
17
7955
18
8595
19
120380
20
166721
[5,6,18,27,48,51,92,396,678,1259,2085,2820,3009, 4311,5015,7775,7955,8595,120380,166721]