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 | 3 |
| 3 | 7 |
| 4 | 18 |
| 5 | 46 |
| 6 | 122 |
| 7 | 326 |
| 8 | 863 |
| 9 | 2252 |
| 10 | 5757 |
| 11 | 14430 |
| 12 | 35531 |
| 13 | 86215 |
| 14 | 206613 |
| 15 | 490247 |
| 16 | 1153733 |
| 17 | 2696961 |
| 18 | 6268921 |
| 19 | 14502345 |
| 20 | 33410523 |
| 21 | 76691414 |
| 22 | 175465674 |
| 23 | 400268753 |
| 24 | 910604494 |
| 25 | 2066396936 |
| 26 | 4678171694 |
| 27 | 10567687439 |
| 28 | 23822090548 |
| 29 | 53595047261 |
| 30 | 120353301562 |
| 31 | 269786130398 |
| 32 | 603734094052 |