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 | 181 |
| 2 | 12421 |
| 3 | 30403 |
| 4 | 1008001 |
| 5 | 1114111 |
| 6 | 1212121 |
| 7 | 100161001 |
| 8 | 100404001 |
| 9 | 101060101 |
| 10 | 101141101 |
| 11 | 102040201 |
| 12 | 102202201 |
| 13 | 104000401 |
| 14 | 130020031 |
| 15 | 140000041 |
| 16 | 10001610001 |
| 17 | 10013031001 |
| 18 | 10100600101 |
| 19 | 10102220101 |
| 20 | 10130003101 |