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 | 2 |
| 4 | 3 |
| 5 | 6 |
| 6 | 10 |
| 7 | 23 |
| 8 | 46 |
| 9 | 108 |
| 10 | 231 |
| 11 | 561 |
| 12 | 1285 |
| 13 | 3139 |
| 14 | 7348 |
| 15 | 18265 |
| 16 | 43907 |
| 17 | 109887 |
| 18 | 267582 |
| 19 | 675866 |
| 20 | 1669909 |
| 21 | 4238462 |
| 22 | 10555192 |
| 23 | 26955062 |
| 24 | 67706032 |
| 25 | 173591181 |
| 26 | 438555624 |
| 27 | 1129088048 |
| 28 | 2869732770 |
| 29 | 7410059898 |
| 30 | 18911818801 |
| 31 | 48986728672 |
| 32 | 125562853003 |
| 33 | 326011708368 |