A170998 - OEIS

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A170998 as a simple table

n	a(n)
2	2
3	86093440
4	5642133787008
5	19994654452125184
6	13120458818999011032
7	2852277353239208548608
8	283889181859169785013248
9	15786934495235533394850816
10	559374323532926110389380124

[2,86093440,5642133787008,19994654452125184, 13120458818999011032,2852277353239208548608, 283889181859169785013248, 15786934495235533394850816, 559374323532926110389380124]