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A358684
as a simple table
n
a(n)
0
0
1
0
2
0
3
0
4
0
5
23
6
46
7
73
8
206
9
491
10
999
11
2030
12
4080
13
8151
[0,0,0,0,0,23,46,73,206,491,999,2030,4080,8151]