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 | 4356 |
| 2 | 43956 |
| 3 | 439956 |
| 4 | 4399956 |
| 5 | 43564356 |
| 6 | 43999956 |
| 7 | 435604356 |
| 8 | 439999956 |
| 9 | 4356004356 |
| 10 | 4395643956 |
| 11 | 4399999956 |
| 12 | 43560004356 |
| 13 | 43956043956 |
| 14 | 43999999956 |
| 15 | 435600004356 |
| 16 | 435643564356 |
| 17 | 439560043956 |
| 18 | 439956439956 |
| 19 | 439999999956 |