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A213956
as a simple table
n
a(n)
1
3
2
42
3
3186
4
1299735
5
2860343784
6
34107691901433
7
2211749000480369037
8
782349734245964422491828
[3,42,3186,1299735,2860343784,34107691901433, 2211749000480369037,782349734245964422491828]