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 | 33 |
| 2 | 66 |
| 3 | 99 |
| 4 | 1212 |
| 5 | 1515 |
| 6 | 1818 |
| 7 | 2121 |
| 8 | 2424 |
| 9 | 2727 |
| 10 | 3030 |
| 11 | 3333 |
| 12 | 3636 |
| 13 | 3939 |
| 14 | 4242 |
| 15 | 4545 |
| 16 | 4848 |
| 17 | 5151 |
| 18 | 5454 |
| 19 | 5757 |
| 20 | 6060 |
| 21 | 6363 |
| 22 | 6666 |
| 23 | 6969 |
| 24 | 7272 |
| 25 | 7575 |
| 26 | 7878 |
| 27 | 8181 |
| 28 | 8484 |
| 29 | 8787 |
| 30 | 9090 |
| 31 | 9393 |
| 32 | 9696 |
| 33 | 9999 |
| 34 | 102102 |
| 35 | 105105 |
| 36 | 108108 |
| 37 | 111111 |
| 38 | 114114 |
| 39 | 117117 |
| 40 | 120120 |
| 41 | 123123 |