A235520 - OEIS

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A235520 as a simple table

n	a(n)
1	20164
2	1693053
3	136233789
4	8849747316
5	569055271070
6	29822537207178
7	1571264979362306
8	68874735366332203
9	3041344407262868925
10	114330480823095423147
11	4332358632370420614992
12	142558641746950286696618

[20164,1693053,136233789,8849747316,569055271070, 29822537207178,1571264979362306,68874735366332203, 3041344407262868925,114330480823095423147, 4332358632370420614992,142558641746950286696618]