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) |
|---|---|
| 0 | 3 |
| 1 | 3 |
| 2 | 7 |
| 3 | 23 |
| 4 | 19 |
| 5 | 479 |
| 6 | 2879 |
| 7 | 19 |
| 8 | 179 |
| 9 | 2551 |
| 10 | 14515199 |
| 11 | 159667199 |
| 12 | 26246663 |
| 13 | 47 |
| 14 | 3007159 |
| 15 | 85303 |
| 16 | 43 |
| 17 | 455999 |
| 18 | 13099 |
| 19 | 311369011223 |
| 20 | 7791519641878751 |
| 21 | 59 |
| 22 | 50207 |
| 23 | 149709500816123 |
| 24 | 71 |
| 25 | 61651424911 |
| 26 | 1146111319366855507 |
| 27 | 3902575987 |
| 28 | 27963070149883187169101323 |
| 29 | 3262754470190705587633531 |