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 | 2 |
| 2 | 3 |
| 3 | 5 |
| 4 | 7 |
| 5 | 13 |
| 6 | 37 |
| 7 | 61 |
| 8 | 181 |
| 9 | 241 |
| 10 | 2521 |
| 11 | 7561 |
| 12 | 15121 |
| 13 | 20161 |
| 14 | 45361 |
| 15 | 55441 |
| 16 | 110881 |
| 17 | 332641 |
| 18 | 498961 |
| 19 | 4324321 |
| 20 | 14414401 |
| 21 | 43243201 |
| 22 | 110270161 |
| 23 | 183783601 |
| 24 | 367567201 |
| 25 | 4655851201 |
| 26 | 13967553601 |
| 27 | 73329656401 |
| 28 | 293318625601 |
| 29 | 1606268664001 |