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 | 1 |
| 3 | 1 |
| 4 | 2 |
| 5 | 5 |
| 6 | 11 |
| 7 | 22 |
| 8 | 45 |
| 9 | 99 |
| 10 | 226 |
| 11 | 515 |
| 12 | 1168 |
| 13 | 2670 |
| 14 | 6186 |
| 15 | 14467 |
| 16 | 33985 |
| 17 | 80105 |
| 18 | 189636 |
| 19 | 451060 |
| 20 | 1077225 |
| 21 | 2580979 |
| 22 | 6201602 |
| 23 | 14942480 |
| 24 | 36098349 |
| 25 | 87417956 |
| 26 | 212159347 |
| 27 | 515937882 |
| 28 | 1257048536 |
| 29 | 3068146679 |
| 30 | 7500995555 |
| 31 | 18366760161 |
| 32 | 45037590888 |
| 33 | 110588510089 |