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A155492 as a simple table

n a(n)
1 21
2 69
3 1015
4 1421
5 2839
6 3245
7 4055
8 4257
9 4663
10 4865
11 6081
12 6891
13 7093
14 7295
15 86115
16 88117
17 90119
18 92121
19 94123
20 96125
21 102133
22 104135
23 108141
24 110143
25 112145
26 114147
27 118153
28 120155

[21,69,1015,1421,2839,3245,4055,4257,4663,4865,
 6081,6891,7093,7295,86115,88117,90119,92121,94123,
 96125,102133,104135,108141,110143,112145,114147,
 118153,120155]

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Last modified June 23 10:38 EDT 2024. Contains 373643 sequences. (Running on oeis4.)