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 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 3 |
| 4 | 4 |
| 5 | 5 |
| 6 | 6 |
| 7 | 7 |
| 8 | 8 |
| 9 | 9 |
| 10 | 55 |
| 11 | 515 |
| 12 | 66 |
| 13 | 616 |
| 14 | 77 |
| 15 | 717 |
| 16 | 88 |
| 17 | 818 |
| 18 | 99 |
| 19 | 919 |
| 20 | 929 |
| 21 | 939 |
| 22 | 949 |
| 23 | 959 |
| 24 | 969 |
| 25 | 979 |
| 26 | 989 |
| 27 | 999 |
| 28 | 9559 |
| 29 | 95159 |
| 30 | 9669 |
| 31 | 96169 |
| 32 | 9779 |
| 33 | 97179 |
| 34 | 9889 |
| 35 | 98189 |
| 36 | 9999 |
| 37 | 99199 |
| 38 | 99299 |
| 39 | 99399 |
| 40 | 99499 |
| 41 | 99599 |
| 42 | 99699 |
| 43 | 99799 |
| 44 | 99899 |
| 45 | 99999 |