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 | 3 |
| 2 | 9 |
| 3 | 72 |
| 4 | 81 |
| 5 | 432 |
| 6 | 972 |
| 7 | 8721 |
| 8 | 6651 |
| 9 | 98631 |
| 10 | 99540 |
| 11 | 777411 |
| 12 | 544311 |
| 13 | 9543321 |
| 14 | 9987642 |
| 15 | 98744310 |
| 16 | 76443210 |
| 17 | 964321110 |
| 18 | 988744320 |
| 19 | 7666422111 |
| 20 | 8876444310 |
| 21 | 65433321000 |
| 22 | 99865331100 |
| 23 | 98877443211 |
| 24 | 988654432221 |
| 25 | 988876444320 |
| 26 | 9888655432221 |