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A066245
as a simple table
n
a(n)
1
3
2
6
3
10
4
34
5
50
6
91
7
222
8
364
9
1485
10
6640
11
18579
12
775698
13
1035507
14
1706366
15
46388515
16
75714802
[3,6,10,34,50,91,222,364,1485,6640,18579,775698, 1035507,1706366,46388515,75714802]