A237887 - OEIS

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A237887 as a simple table

n	a(n)
0	1
1	1
2	1
3	5
4	65
5	8621
6	149184857
7	44551677001092773
8	3970578415163336458099984005568433
9	31532720313075764582758396083530822599715967108537469217279098897853

[1,1,1,5,65,8621,149184857,44551677001092773, 3970578415163336458099984005568433, 31532720313075764582758396083530822599715967108537\ 469217279098897853]