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A267659
as a simple table
n
a(n)
1
1
2
3
3
17
4
203
5
7672
6
201362
7
3562990
8
52241496
9
855234512
10
19809675462
[1,3,17,203,7672,201362,3562990,52241496, 855234512,19809675462]