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 | 6 |
| 3 | 10 |
| 4 | 66 |
| 5 | 666 |
| 6 | 10011 |
| 7 | 16110 |
| 8 | 66066 |
| 9 | 600060 |
| 10 | 6601161 |
| 11 | 10006101 |
| 12 | 11066160 |
| 13 | 660061611 |
| 14 | 1001661661 |
| 15 | 1061660160 |
| 16 | 1100016060 |
| 17 | 1660061010 |
| 18 | 1001000010660 |
| 19 | 1066006600011 |
| 20 | 10010000160006 |
| 21 | 106001000601616 |
| 22 | 60660116660011611 |
| 23 | 1660616006066010601060060 |