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 | 1 |
| 1 | 7 |
| 2 | 77 |
| 3 | 477 |
| 4 | 6477 |
| 5 | 46477 |
| 6 | 446477 |
| 7 | 5446477 |
| 8 | 85446477 |
| 9 | 385446477 |
| 10 | 4385446477 |
| 11 | 44385446477 |
| 12 | 644385446477 |
| 13 | 8644385446477 |
| 14 | 38644385446477 |
| 15 | 138644385446477 |
| 16 | 5138644385446477 |
| 17 | 115138644385446477 |
| 18 | 15138644385446477 |
| 19 | 5015138644385446477 |