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A119159
as a simple table
n
a(n)
1
9
2
10
3
225
4
714
5
6714
6
22114
7
2119209
8
2211449
9
102523609
10
942573334
11
95336514049
12
3333030289167658390
[9,10,225,714,6714,22114,2119209,2211449, 102523609,942573334,95336514049, 3333030289167658390]