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A057577
as a simple table
n
a(n)
0
9
1
12
2
22
3
42
4
72
5
144
6
288
7
576
8
1152
[9,12,22,42,72,144,288,576,1152]
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Last modified March 28 13:42 EDT 2024. Contains 371254 sequences. (Running on oeis4.)