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 | 0 |
| 2 | 0 |
| 3 | 0 |
| 4 | 0 |
| 5 | 1 |
| 6 | 2 |
| 7 | 3 |
| 8 | 4 |
| 9 | 10 |
| 10 | 21 |
| 11 | 32 |
| 12 | 43 |
| 13 | 54 |
| 14 | 165 |
| 15 | 276 |
| 16 | 387 |
| 17 | 498 |
| 18 | 1109 |
| 19 | 2220 |
| 20 | 3331 |
| 21 | 4442 |
| 22 | 5553 |
| 23 | 16664 |
| 24 | 27775 |
| 25 | 38886 |
| 26 | 49997 |
| 27 | 111108 |
| 28 | 222219 |
| 29 | 333330 |
| 30 | 444441 |
| 31 | 555552 |
| 32 | 1666663 |
| 33 | 2777774 |
| 34 | 3888885 |
| 35 | 4999996 |
| 36 | 11111107 |
| 37 | 22222218 |
| 38 | 33333329 |
| 39 | 44444440 |
| 40 | 55555551 |
| 41 | 166666662 |