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 | 2 |
| 3 | 5 |
| 4 | 13 |
| 5 | 35 |
| 6 | 84 |
| 7 | 198 |
| 8 | 414 |
| 9 | 960 |
| 10 | 1898 |
| 11 | 4263 |
| 12 | 8556 |
| 13 | 18473 |
| 14 | 37490 |
| 15 | 79526 |
| 16 | 159956 |
| 17 | 338873 |
| 18 | 680306 |
| 19 | 1438941 |
| 20 | 2869908 |
| 21 | 6057397 |
| 22 | 12038460 |
| 23 | 25300258 |
| 24 | 50460684 |
| 25 | 105275708 |
| 26 | 211424744 |
| 27 | 437486956 |
| 28 | 879869316 |
| 29 | 1810901110 |
| 30 | 3642407379 |
| 31 | 7495644753 |
| 32 | 15038540180 |
| 33 | 30957576741 |