A193747 - OEIS

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A193747 as a simple table

n	a(n)
1	1
2	2
3	91
4	5
5	1222981
6	13867245
7	4644275800711
8	3331605615
9	4806028313710522550281
10	1185520435892914104577275
11	1305063339568963727983307233802251
12	320735961523340363019772627010045

[1,2,91,5,1222981,13867245,4644275800711, 3331605615,4806028313710522550281, 1185520435892914104577275, 1305063339568963727983307233802251, 320735961523340363019772627010045]