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A266852
as a simple table
n
a(n)
1
1
2
0
3
1
4
6
5
171
6
7637
7
597012
8
61297802
9
8302773834
10
1419843626102
11
298978224319607
[1,0,1,6,171,7637,597012,61297802,8302773834, 1419843626102,298978224319607]