A283851 - OEIS

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A283851 as a simple table

n	a(n)
1	2
2	16
3	409
4	35373
5	10741381
6	10634931992
7	35481195059121
8	402875332003637009
9	15356708293578353570000
10	1967963796346049662173630851
11	850722520813357296311553404161550

[2,16,409,35373,10741381,10634931992, 35481195059121,402875332003637009, 15356708293578353570000, 1967963796346049662173630851, 850722520813357296311553404161550]