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) |
|---|---|
| 3 | 2 |
| 4 | 7 |
| 5 | 47 |
| 6 | 57 |
| 7 | 459 |
| 8 | 1023 |
| 9 | 3349 |
| 10 | 3601 |
| 11 | 42131 |
| 12 | 44441 |
| 13 | 605453 |
| 14 | 631193 |
| 15 | 655217 |
| 16 | 1355479 |
| 17 | 23763863 |
| 18 | 24444543 |
| 19 | 476698557 |
| 20 | 488338185 |
| 21 | 499423545 |
| 22 | 510005025 |
| 23 | 11962908135 |
| 24 | 12186001005 |
| 25 | 62000850801 |
| 26 | 63030510201 |
| 27 | 192066102203 |
| 28 | 194934439103 |
| 29 | 5733412167187 |
| 30 | 5811048485947 |