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 | 2 |
| 3 | 3 |
| 4 | 7 |
| 5 | 13 |
| 6 | 29 |
| 7 | 53 |
| 8 | 107 |
| 9 | 211 |
| 10 | 431 |
| 11 | 809 |
| 12 | 1619 |
| 13 | 3037 |
| 14 | 6079 |
| 15 | 11467 |
| 16 | 22937 |
| 17 | 43541 |
| 18 | 87083 |
| 19 | 166183 |
| 20 | 332393 |
| 21 | 636761 |
| 22 | 1273541 |
| 23 | 2448049 |
| 24 | 4896103 |
| 25 | 9438851 |
| 26 | 18877711 |
| 27 | 36484271 |
| 28 | 72968563 |
| 29 | 141332173 |
| 30 | 282664351 |
| 31 | 548544487 |
| 32 | 1097088989 |
| 33 | 2132671027 |
| 34 | 4265342057 |