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 | 6 |
| 5 | 7 |
| 6 | 19 |
| 7 | 34 |
| 8 | 67 |
| 9 | 102 |
| 10 | 115 |
| 11 | 190 |
| 12 | 2066 |
| 13 | 24381 |
| 14 | 24398 |
| 15 | 24399 |
| 16 | 36130540 |
| 17 | 409493529 |
| 18 | 3744514071 |
| 19 | 17951662018 |
| 20 | 71184216405 |