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) |
|---|---|
| 3 | 561 |
| 4 | 8911 |
| 5 | 75361 |
| 6 | 997633 |
| 7 | 9890881 |
| 8 | 99861985 |
| 9 | 993905641 |
| 10 | 9999109081 |
| 11 | 99976607641 |
| 12 | 999629786233 |
| 13 | 9999501351841 |
| 14 | 99994742993377 |
| 15 | 999922265173441 |
| 16 | 9999924433632001 |
| 17 | 99999201310035841 |
| 18 | 999996386511276505 |
| 19 | 9999998594193164041 |