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 | 28 |
| 2 | 45 |
| 3 | 153 |
| 4 | 171 |
| 5 | 325 |
| 6 | 4753 |
| 7 | 7381 |
| 8 | 29161 |
| 9 | 56953 |
| 10 | 65341 |
| 11 | 166753 |
| 12 | 354061 |
| 13 | 5649841 |
| 14 | 6060421 |
| 15 | 6835753 |
| 16 | 6924781 |
| 17 | 12708361 |
| 18 | 19478161 |
| 19 | 24231241 |
| 20 | 52035301 |
| 21 | 56791153 |
| 22 | 147258541 |
| 23 | 186660181 |
| 24 | 282304441 |
| 25 | 326081953 |
| 26 | 520273153 |
| 27 | 536657941 |
| 28 | 704531953 |
| 29 | 784139401 |
| 30 | 1215121753 |