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 | 1 |
| 1 | 2 |
| 2 | 5 |
| 3 | 13 |
| 4 | 32 |
| 5 | 79 |
| 6 | 197 |
| 7 | 490 |
| 8 | 1217 |
| 9 | 3025 |
| 10 | 7520 |
| 11 | 18691 |
| 12 | 46457 |
| 13 | 115474 |
| 14 | 287021 |
| 15 | 713413 |
| 16 | 1773248 |
| 17 | 4407559 |
| 18 | 10955357 |
| 19 | 27230458 |
| 20 | 67683593 |
| 21 | 168233257 |
| 22 | 418157888 |
| 23 | 1039366555 |
| 24 | 2583432881 |
| 25 | 6421339426 |
| 26 | 15960778517 |
| 27 | 39671855677 |
| 28 | 98607729632 |