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 | 27 |
| 2 | 223 |
| 3 | 1467 |
| 4 | 11303 |
| 5 | 88377 |
| 6 | 707923 |
| 7 | 5747433 |
| 8 | 47168039 |
| 9 | 390278007 |
| 10 | 3250471333 |
| 11 | 27216501185 |
| 12 | 228895105331 |
| 13 | 1932205156259 |
| 14 | 16362201900939 |
| 15 | 138934036864707 |
| 16 | 1182486246555079 |
| 17 | 10084940483186669 |
| 18 | 86164966628165665 |