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 | 55 |
| 3 | 1665 |
| 4 | 269884 |
| 5 | 6565656565 |
| 6 | 1121212121211 |
| 7 | 176767676767675 |
| 8 | 26262626262626260 |
| 9 | 3727272727272727269 |
| 10 | 510101010101010101005 |
| 11 | 67777777777777777777771 |
| 12 | 8787878787878787878787870 |
| 13 | 1116161616161616161616161605 |