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 | 1 |
| 2 | 12 |
| 3 | 23 |
| 4 | 133 |
| 5 | 144 |
| 6 | 254 |
| 7 | 364 |
| 8 | 1464 |
| 9 | 1475 |
| 10 | 1585 |
| 11 | 1695 |
| 12 | 2795 |
| 13 | 2905 |
| 14 | 4005 |
| 15 | 5105 |
| 16 | 16105 |
| 17 | 16116 |
| 18 | 16226 |
| 19 | 16336 |
| 20 | 17436 |
| 21 | 17546 |
| 22 | 18646 |
| 23 | 19746 |
| 24 | 30746 |
| 25 | 30856 |
| 26 | 31956 |
| 27 | 33056 |
| 28 | 44056 |
| 29 | 45156 |
| 30 | 56156 |
| 31 | 67156 |
| 32 | 177156 |
| 33 | 177167 |
| 34 | 177277 |
| 35 | 177387 |
| 36 | 178487 |
| 37 | 178597 |
| 38 | 179697 |
| 39 | 180797 |
| 40 | 191797 |