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 | 111 |
| 2 | 222 |
| 3 | 333 |
| 4 | 444 |
| 5 | 555 |
| 6 | 666 |
| 7 | 777 |
| 8 | 888 |
| 9 | 999 |
| 10 | 1110 |
| 11 | 1221 |
| 12 | 1332 |
| 13 | 1443 |
| 14 | 1554 |
| 15 | 1665 |
| 16 | 1776 |
| 17 | 1887 |
| 18 | 1998 |
| 19 | 2109 |
| 20 | 2220 |
| 21 | 2331 |
| 22 | 2442 |
| 23 | 2553 |
| 24 | 2664 |
| 25 | 2775 |
| 26 | 2886 |
| 27 | 2997 |
| 28 | 3108 |
| 29 | 3219 |
| 30 | 3330 |
| 31 | 3441 |
| 32 | 3552 |
| 33 | 3663 |
| 34 | 3774 |
| 35 | 3885 |
| 36 | 3996 |
| 37 | 4107 |
| 38 | 4218 |
| 39 | 4329 |
| 40 | 4440 |
| 41 | 4551 |
| 42 | 4662 |
| 43 | 4773 |
| 44 | 4884 |
| 45 | 4995 |
| 46 | 5106 |