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A293399
as a simple table
n
a(n)
1
0
2
1
3
4
4
6
5
9
6
20
7
57
8
64
9
88
10
196
11
265
12
421
13
620
14
654
15
729
16
1587
17
4863
18
6628
19
12358
20
23773
21
68798
22
119931
[0,1,4,6,9,20,57,64,88,196,265,421,620,654,729, 1587,4863,6628,12358,23773,68798,119931]