A198952 - OEIS

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A198952 as a simple table

n	a(n)
0	1
1	1
2	3
3	45
4	3267
5	991845
6	1155605211
7	4910640919821
8	73614877173054099
9	3802910817051064124469
10	665332303024345700007225099
11	388955052253927480089824057425437
12	751710022839628223241451188902204177091

[1,1,3,45,3267,991845,1155605211,4910640919821, 73614877173054099,3802910817051064124469, 665332303024345700007225099, 388955052253927480089824057425437, 751710022839628223241451188902204177091]