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A390378
as a simple table
n
a(n)
0
4
1
4
2
8
3
6
4
13
5
74
6
295
7
842
8
2848
9
9267
10
73858
11
481646
[4,4,8,6,13,74,295,842,2848,9267,73858,481646]
