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 | 0 |
| 1 | 1 |
| 2 | 3 |
| 3 | 8 |
| 4 | 19 |
| 5 | 46 |
| 6 | 106 |
| 7 | 241 |
| 8 | 541 |
| 9 | 1198 |
| 10 | 2629 |
| 11 | 5724 |
| 12 | 12380 |
| 13 | 26625 |
| 14 | 56978 |
| 15 | 121413 |
| 16 | 257740 |
| 17 | 545308 |
| 18 | 1150272 |
| 19 | 2419856 |
| 20 | 5078336 |
| 21 | 10633921 |
| 22 | 22222338 |
| 23 | 46353669 |
| 24 | 96525324 |
| 25 | 200686620 |
| 26 | 416645184 |
| 27 | 863834256 |
| 28 | 1788756288 |
| 29 | 3699688128 |
| 30 | 7643727360 |
| 31 | 15776156928 |
| 32 | 32529718272 |