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 | 4 |
| 2 | 5 |
| 3 | 9 |
| 4 | 41 |
| 5 | 747 |
| 6 | 3029 |
| 7 | 3776 |
| 8 | 6805 |
| 9 | 30996 |
| 10 | 564733 |
| 11 | 2289928 |
| 12 | 2854661 |
| 13 | 5144589 |
| 14 | 23433017 |
| 15 | 426938895 |
| 16 | 1731188597 |
| 17 | 2158127492 |
| 18 | 3889316089 |
| 19 | 17715391848 |
| 20 | 322766369353 |
| 21 | 1308780869260 |
| 22 | 1631547238613 |
| 23 | 2940328107873 |
| 24 | 13392859670105 |
| 25 | 244011802169763 |
| 26 | 989440068349157 |