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 | 3 |
| 2 | 9 |
| 3 | 15 |
| 4 | 17 |
| 5 | 19 |
| 6 | 29 |
| 7 | 31 |
| 8 | 45 |
| 9 | 55 |
| 10 | 63 |
| 11 | 73 |
| 12 | 101 |
| 13 | 135 |
| 14 | 173 |
| 15 | 217 |
| 16 | 271 |
| 17 | 439 |
| 18 | 535 |
| 19 | 729 |
| 20 | 787 |
| 21 | 933 |
| 22 | 1473 |
| 23 | 1651 |
| 24 | 6617 |
| 25 | 7805 |
| 26 | 12461 |
| 27 | 13253 |
| 28 | 18627 |
| 29 | 20243 |
| 30 | 55271 |