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 | 1 |
| 2 | 5 |
| 3 | 11 |
| 4 | 77 |
| 5 | 135 |
| 6 | 231 |
| 7 | 385 |
| 8 | 627 |
| 9 | 1575 |
| 10 | 8349 |
| 11 | 17977 |
| 12 | 26015 |
| 13 | 75175 |
| 14 | 147273 |
| 15 | 281589 |
| 16 | 386155 |
| 17 | 526823 |
| 18 | 966467 |
| 19 | 3087735 |
| 20 | 5392783 |
| 21 | 9289091 |
| 22 | 20506255 |
| 23 | 44108109 |
| 24 | 56634173 |
| 25 | 72533807 |
| 26 | 241265379 |
| 27 | 304801365 |
| 28 | 952050665 |
| 29 | 1482074143 |
| 30 | 6620830889 |