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 | 6 |
| 2 | 29 |
| 3 | 97 |
| 4 | 343 |
| 5 | 1131 |
| 6 | 3338 |
| 7 | 10336 |
| 8 | 29644 |
| 9 | 88555 |
| 10 | 260497 |
| 11 | 728358 |
| 12 | 2103284 |
| 13 | 6020698 |
| 14 | 16594432 |
| 15 | 46969365 |
| 16 | 128670281 |
| 17 | 361020986 |
| 18 | 1008411198 |
| 19 | 2742388946 |
| 20 | 7613161908 |
| 21 | 20632925370 |
| 22 | 56988914979 |
| 23 | 156977658446 |
| 24 | 423559114311 |