A203756 - OEIS

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A203756 as a simple table

n	a(n)
1	1
2	2
3	4624
4	147968
5	5124555396
6	830177974152
7	142070471498727424
8	72740081407348441088
9	38931932500357955277610000
10	48664915625447444097012500000
11	63249728823972809508391754919837696

[1,2,4624,147968,5124555396,830177974152, 142070471498727424,72740081407348441088, 38931932500357955277610000, 48664915625447444097012500000, 63249728823972809508391754919837696]