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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 10 |
| 5 | 25 |
| 6 | 100 |
| 7 | 1000 |
| 8 | 1020 |
| 9 | 1489 |
| 10 | 2248 |
| 11 | 10000 |
| 12 | 10090 |
| 13 | 100000 |
| 14 | 100910 |
| 15 | 102020 |
| 16 | 167491 |
| 17 | 1000000 |
| 18 | 1000200 |
| 19 | 1009090 |
| 20 | 2744934 |
| 21 | 10000000 |
| 22 | 10000900 |
| 23 | 10090910 |
| 24 | 24917195 |
| 25 | 100000000 |
| 26 | 100909090 |
| 27 | 103226660 |
| 28 | 271867456 |
| 29 | 1000000000 |
| 30 | 1000002000 |
| 31 | 1009090910 |
| 32 | 1577033471 |