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 | 351636153 |
| 2 | 6260330626 |
| 3 | 9999999999 |
| 4 | 99999999999 |
| 5 | 999999999999 |
| 6 | 9971824281799 |
| 7 | 9999999999999 |
| 8 | 59999999999995 |
| 9 | 89999999999998 |
| 10 | 99999999999999 |
| 11 | 499999999999994 |
| 12 | 596038242830695 |
| 13 | 599999999999995 |