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A098898
as a simple table
n
a(n)
1
21
2
27
3
45
4
63
5
65
6
69
7
81
8
87
9
201
10
207
11
211
12
213
13
218
14
219
15
225
16
231
17
235
18
237
19
238
[21,27,45,63,65,69,81,87,201,207,211,213,218,219, 225,231,235,237,238]
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Last modified August 22 21:04 EDT 2024. Contains 375369 sequences. (Running on oeis4.)