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A216521 as a simple table

n a(n)
1 3
2 15
3 21
4 33
5 39
6 57
7 105
8 129
9 147
10 159
11 183
12 231
13 237
14 273
15 303
16 399
17 501
18 633
19 735
20 903
21 1029
22 1041
23 1083
24 1113 

[3,15,21,33,39,57,105,129,147,159,183,231,237,273,
 303,399,501,633,735,903,1029,1041,1083,1113]

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Last modified April 24 08:28 EDT 2024. Contains 371927 sequences. (Running on oeis4.)