A255587 - OEIS

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A255587 as a simple table

n	a(n)
0	1
1	2
2	10
3	960
4	13950764
5	255690851718529024
6	1771080720430629161685158978892152599456
7	857834471403601877816627441633642526746656338035964968069692458744011458425706833248256

[1,2,10,960,13950764,255690851718529024, 1771080720430629161685158978892152599456, 85783447140360187781662744163364252674665633803596\ 4968069692458744011458425706833248256]