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 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 19 |
| 5 | 20 |
| 6 | 24 |
| 7 | 34 |
| 8 | 77 |
| 9 | 107 |
| 10 | 114 |
| 11 | 122 |
| 12 | 165 |
| 13 | 530 |
| 14 | 1999 |
| 15 | 4359 |
| 16 | 11842 |
| 17 | 12059 |
| 18 | 13802 |
| 19 | 22855 |
| 20 | 41679 |
| 21 | 58185 |
| 22 | 145359 |
| 23 | 249987 |