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 | 2 |
| 2 | 7 |
| 3 | 29 |
| 4 | 107 |
| 5 | 431 |
| 6 | 1619 |
| 7 | 6079 |
| 8 | 22937 |
| 9 | 87083 |
| 10 | 332393 |
| 11 | 1273541 |
| 12 | 4896103 |
| 13 | 18877711 |
| 14 | 72968563 |
| 15 | 282664351 |
| 16 | 1097088989 |
| 17 | 4265342057 |
| 18 | 16608401041 |
| 19 | 64758466127 |
| 20 | 252814859149 |
| 21 | 988089813541 |
| 22 | 3865761355523 |
| 23 | 15138431958437 |
| 24 | 59333638261529 |
| 25 | 232737382916429 |