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 | 0 |
| 2 | 3 |
| 3 | 9 |
| 4 | 24 |
| 5 | 58 |
| 6 | 125 |
| 7 | 251 |
| 8 | 490 |
| 9 | 948 |
| 10 | 1823 |
| 11 | 3485 |
| 12 | 6636 |
| 13 | 12614 |
| 14 | 23961 |
| 15 | 45495 |
| 16 | 86350 |
| 17 | 163856 |
| 18 | 310899 |
| 19 | 589873 |
| 20 | 1119144 |
| 21 | 2123266 |
| 22 | 4028261 |
| 23 | 7642379 |
| 24 | 14499018 |
| 25 | 27507300 |
| 26 | 52186343 |
| 27 | 99006909 |
| 28 | 187833924 |
| 29 | 356354718 |
| 30 | 676068905 |
| 31 | 1282624071 |
| 32 | 2433368030 |
| 33 | 4616535768 |