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A350580
as a simple table
n
a(n)
1
0
2
0
3
0
4
0
5
0
6
0
7
2
8
11
9
76
10
422
11
2187
12
10625
13
49381
14
221738
15
969583
16
4153567
[0,0,0,0,0,0,2,11,76,422,2187,10625,49381,221738, 969583,4153567]