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 | 1 |
| 2 | 5 |
| 3 | 14 |
| 4 | 34 |
| 5 | 95 |
| 6 | 208 |
| 7 | 537 |
| 8 | 1090 |
| 9 | 2812 |
| 10 | 5566 |
| 11 | 12480 |
| 12 | 26199 |
| 13 | 53486 |
| 14 | 112866 |
| 15 | 229111 |
| 16 | 450800 |
| 17 | 885030 |
| 18 | 1778190 |
| 19 | 3319846 |
| 20 | 6624376 |
| 21 | 12354288 |
| 22 | 23674929 |
| 23 | 43485580 |
| 24 | 81441398 |
| 25 | 149864634 |
| 26 | 273431081 |
| 27 | 503205344 |
| 28 | 906757150 |
| 29 | 1630802024 |
| 30 | 2920280596 |
| 31 | 5166820832 |