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 | 10 |
| 1 | 99 |
| 2 | 988 |
| 3 | 9877 |
| 4 | 98766 |
| 5 | 987655 |
| 6 | 9876544 |
| 7 | 98765433 |
| 8 | 987654322 |
| 9 | 9876543211 |
| 10 | 98765432100 |
| 11 | 987654320989 |
| 12 | 9876543209878 |
| 13 | 98765432098767 |
| 14 | 987654320987656 |
| 15 | 9876543209876545 |
| 16 | 98765432098765434 |
| 17 | 987654320987654323 |
| 18 | 9876543209876543212 |
| 19 | 98765432098765432101 |