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A006437
as a simple table
n
a(n)
1
70
2
2330
3
32130
4
271285
5
1655800
6
7997850
7
32332170
8
113568455
9
355905030
[70,2330,32130,271285,1655800,7997850,32332170, 113568455,355905030]