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) |
|---|---|
| 1 | 0 |
| 2 | 1 |
| 3 | 15 |
| 4 | 23 |
| 5 | 27 |
| 6 | 99 |
| 7 | 399 |
| 8 | 743 |
| 9 | 2285 |
| 10 | 2683 |
| 11 | 13607 |
| 12 | 18675 |
| 13 | 27299 |
| 14 | 66527 |
| 15 | 108899 |
| 16 | 242087 |
| 17 | 504867 |
| 18 | 1985907 |
| 19 | 2179519 |
| 20 | 7883069 |
| 21 | 11798723 |
| 22 | 20372799 |
| 23 | 29842275 |
| 24 | 49022007 |
| 25 | 70621263 |
| 26 | 91817907 |