A059785 - OEIS

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A059785 as a simple table

n	a(n)
1	2
2	3
3	7
4	47
5	2207
6	4870843
7	23725111530599
8	562880917139361624513298747
9	316834926879648887020732217199607668221645859671769857

[2,3,7,47,2207,4870843,23725111530599, 562880917139361624513298747, 31683492687964888702073221719960766822164585967176\ 9857]