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 | 4 |
| 3 | 9 |
| 4 | 22 |
| 5 | 47 |
| 6 | 107 |
| 7 | 221 |
| 8 | 468 |
| 9 | 953 |
| 10 | 1932 |
| 11 | 3814 |
| 12 | 7560 |
| 13 | 14625 |
| 14 | 28192 |
| 15 | 53757 |
| 16 | 101827 |
| 17 | 190907 |
| 18 | 356362 |
| 19 | 659716 |
| 20 | 1215314 |
| 21 | 2224968 |
| 22 | 4053914 |
| 23 | 7346367 |
| 24 | 13260001 |
| 25 | 23822114 |
| 26 | 42629786 |
| 27 | 75991017 |
| 28 | 134991954 |
| 29 | 238948942 |
| 30 | 421656911 |
| 31 | 741750026 |
| 32 | 1301116634 |
| 33 | 2275985891 |
| 34 | 3971022904 |