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 | 101 |
| 2 | 787 |
| 3 | 12101 |
| 4 | 32323 |
| 5 | 34543 |
| 6 | 78787 |
| 7 | 1012321 |
| 8 | 1212121 |
| 9 | 3212123 |
| 10 | 3212323 |
| 11 | 3454343 |
| 12 | 7654567 |
| 13 | 7656787 |
| 14 | 7676567 |
| 15 | 7678787 |
| 16 | 7876567 |
| 17 | 7898767 |
| 18 | 101012321 |
| 19 | 101210101 |
| 20 | 101232121 |
| 21 | 121232101 |
| 22 | 123210121 |
| 23 | 123232121 |
| 24 | 321234343 |
| 25 | 323232323 |