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 | 4 |
| 1 | 5 |
| 2 | 14 |
| 3 | 61 |
| 4 | 136 |
| 5 | 197 |
| 6 | 1712 |
| 7 | 1909 |
| 8 | 5530 |
| 9 | 24029 |
| 10 | 53588 |
| 11 | 77617 |
| 12 | 674524 |
| 13 | 752141 |
| 14 | 2178806 |
| 15 | 9467365 |
| 16 | 21113536 |
| 17 | 30580901 |
| 18 | 265760744 |
| 19 | 296341645 |
| 20 | 858444034 |
| 21 | 3730117781 |
| 22 | 8318679596 |
| 23 | 12048797377 |
| 24 | 104709058612 |