A050649 - OEIS

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A050649 as a simple table

n	a(n)
1	2
2	12
3	2512
4	781252512
5	976562500000000781252512
6	976562500000000000000000000000000000000000000976562500000000781252512

[2,12,2512,781252512,976562500000000781252512, 97656250000000000000000000000000000000000000097656\ 2500000000781252512]