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 | 9009 |
| 2 | 9119 |
| 3 | 9229 |
| 4 | 9339 |
| 5 | 9449 |
| 6 | 9559 |
| 7 | 9669 |
| 8 | 9779 |
| 9 | 9889 |
| 10 | 9999 |
| 11 | 910109 |
| 12 | 911119 |
| 13 | 912129 |
| 14 | 913139 |
| 15 | 914149 |
| 16 | 915159 |
| 17 | 916169 |
| 18 | 917179 |
| 19 | 918189 |
| 20 | 919199 |
| 21 | 920209 |
| 22 | 921219 |
| 23 | 922229 |
| 24 | 923239 |
| 25 | 924249 |
| 26 | 925259 |
| 27 | 926269 |
| 28 | 927279 |
| 29 | 928289 |
| 30 | 929299 |
| 31 | 930309 |