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A028874 as a simple table
| n | a(n) |
|---|---|
| 1 | 13 |
| 2 | 61 |
| 3 | 97 |
| 4 | 193 |
| 5 | 397 |
| 6 | 673 |
| 7 | 1021 |
| 8 | 1153 |
| 9 | 1597 |
| 10 | 1933 |
| 11 | 2113 |
| 12 | 3361 |
| 13 | 4093 |
| 14 | 4621 |
| 15 | 6397 |
| 16 | 7393 |
| 17 | 7741 |
| 18 | 8461 |
| 19 | 9601 |
| 20 | 12097 |
| 21 | 12541 |
| 22 | 13921 |
| 23 | 15373 |
| 24 | 16381 |
| 25 | 18493 |
| 26 | 19597 |
| 27 | 20161 |
| 28 | 21313 |
| 29 | 26893 |
| 30 | 29581 |
| 31 | 36097 |
| 32 | 37633 |
| 33 | 40801 |
| 34 | 42433 |
| 35 | 43261 |
| 36 | 47521 |
| 37 | 48397 |
[13,61,97,193,397,673,1021,1153,1597,1933,2113, 3361,4093,4621,6397,7393,7741,8461,9601,12097, 12541,13921,15373,16381,18493,19597,20161,21313, 26893,29581,36097,37633,40801,42433,43261,47521, 48397] |