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 | 1 |
| 2 | 11 |
| 3 | 111 |
| 4 | 1121 |
| 5 | 11321 |
| 6 | 114331 |
| 7 | 1154631 |
| 8 | 11660641 |
| 9 | 117761041 |
| 10 | 1189271051 |
| 11 | 12010471551 |
| 12 | 121293986561 |
| 13 | 1224950337161 |
| 14 | 12370797358171 |
| 15 | 124932923918871 |
| 16 | 1261700036546881 |
| 17 | 12741933289387681 |
| 18 | 128681032930423691 |
| 19 | 1299552262593624591 |
| 20 | 13124203658866669601 |