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 | 7 |
| 3 | 9 |
| 4 | 66 |
| 5 | 6675 |
| 6 | 6918 |
| 7 | 613374 |
| 8 | 613412 |
| 9 | 613418 |
| 10 | 613422 |
| 11 | 613428 |
| 12 | 613434 |
| 13 | 613510 |
| 14 | 613512 |
| 15 | 613514 |
| 16 | 613520 |
| 17 | 613542 |
| 18 | 58155531 |
| 19 | 58155569 |
| 20 | 58155572 |
| 21 | 6384425518 |
| 22 | 6384425556 |
| 23 | 819217006165 |
| 24 | 819217006175 |
| 25 | 819217006199 |
| 26 | 819217006203 |
| 27 | 819217006227 |
| 28 | 819217006665 |
| 29 | 819217006869 |