A151611 - OEIS

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A151611 as a simple table

n	a(n)
1	4
2	10
3	49
4	1180
5	695614
6	241939070695
7	29267256964259134356169
8	428286165105987400438217763289707431507000200

[4,10,49,1180,695614,241939070695, 29267256964259134356169, 428286165105987400438217763289707431507000200]