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 | 7 |
| 2 | 97 |
| 3 | 766 |
| 4 | 857 |
| 5 | 909 |
| 6 | 997 |
| 7 | 3284 |
| 8 | 6712 |
| 9 | 9997 |
| 10 | 45451 |
| 11 | 54545 |
| 12 | 99997 |
| 13 | 990099 |
| 14 | 999997 |
| 15 | 8181818 |
| 16 | 9999997 |
| 17 | 70588232 |
| 18 | 99999997 |
| 19 | 343130553 |
| 20 | 362637362 |
| 21 | 363636360 |
| 22 | 420053630 |
| 23 | 421052631 |
| 24 | 497975708 |
| 25 | 502024288 |
| 26 | 578947365 |
| 27 | 579946366 |