A117897 - OEIS

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A117897 as a simple table

n	a(n)
1	1
2	4
3	129
4	16936
5	2357964627
6	1794518358664
7	2862424846028174457
8	5483249282630830360396
9	39471589603944768518079950019
10	3053134546009996125349281528007992109928

[1,4,129,16936,2357964627,1794518358664, 2862424846028174457,5483249282630830360396, 39471589603944768518079950019, 3053134546009996125349281528007992109928]