A276654 - OEIS

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A276654 as a simple table

n	a(n)
0	2
1	21
2	2905
3	281785
4	47740490
5	9178864590
6	8533159052845
7	1817562878255985
8	1801204812351681135
9	787408225243814333670

[2,21,2905,281785,47740490,9178864590, 8533159052845,1817562878255985, 1801204812351681135,787408225243814333670]