This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 5 |
| 2 | 9 |
| 3 | 25 |
| 4 | 37 |
| 5 | 49 |
| 6 | 67 |
| 7 | 73 |
| 8 | 91 |
| 9 | 97 |
| 10 | 145 |
| 11 | 193 |
| 12 | 289 |
| 13 | 385 |
| 14 | 577 |
| 15 | 769 |
| 16 | 1153 |
| 17 | 1537 |
| 18 | 2305 |
| 19 | 3073 |
| 20 | 4609 |
| 21 | 6145 |
| 22 | 9217 |
| 23 | 12289 |
| 24 | 18433 |
| 25 | 24577 |
| 26 | 36865 |
| 27 | 49153 |
| 28 | 73729 |
| 29 | 98305 |
| 30 | 147457 |
| 31 | 196609 |
| 32 | 294913 |
| 33 | 393217 |
| 34 | 589825 |
| 35 | 786433 |
| 36 | 1179649 |
| 37 | 1572865 |
| 38 | 2359297 |
| 39 | 3145729 |
| 40 | 4718593 |
| 41 | 6291457 |