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A143835
as a simple table
n
a(n)
1
7
2
45
3
303
4
2202
5
17185
6
141444
7
1200975
8
10448345
9
92435171
10
828797351
11
7511268020
12
68680339342
[7,45,303,2202,17185,141444,1200975,10448345, 92435171,828797351,7511268020,68680339342]