A000896 - OEIS

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A000896 as a simple table

n	a(n)
1	2
2	6
3	70
4	700229
5	184239362390740969
6	3620071869990730348276861702715495626355546
7	1397856755476623081643981198354119089406016417825924278115794483751825503676804770385912700712220

[2,6,70,700229,184239362390740969, 3620071869990730348276861702715495626355546, 13978567554766230816439811983541190894060164178259\ 24278115794483751825503676804770385912700712220]