A000886 - OEIS

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A000886 as a simple table

n	a(n)
1	2
2	11
3	590
4	7644658
5	6406102803167154
6	19692266672998575394929289976513119
7	957275870017495002938079709038262383344122314736541166025242955633607263

[2,11,590,7644658,6406102803167154, 19692266672998575394929289976513119, 95727587001749500293807970903826238334412231473654\ 1166025242955633607263]