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A224256
as a simple table
n
a(n)
1
3
2
36
3
648
4
12467
5
238366
6
4480391
7
83124099
8
1530419762
9
28072690614
10
514262753781
11
9420094252771
[3,36,648,12467,238366,4480391,83124099, 1530419762,28072690614,514262753781,9420094252771]