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 | 8 |
| 3 | 26 |
| 4 | 92 |
| 5 | 332 |
| 6 | 1220 |
| 7 | 4538 |
| 8 | 17036 |
| 9 | 64412 |
| 10 | 244928 |
| 11 | 935684 |
| 12 | 3588392 |
| 13 | 13806704 |
| 14 | 53271548 |
| 15 | 206040506 |
| 16 | 798600332 |
| 17 | 3101109164 |
| 18 | 12062148368 |
| 19 | 46986821516 |
| 20 | 183276382472 |
| 21 | 715748620424 |
| 22 | 2798274135368 |
| 23 | 10951009023716 |
| 24 | 42895901012792 |
| 25 | 168167959150232 |
| 26 | 659793819847040 |