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 | 7 |
| 2 | 7311 |
| 3 | 8990 |
| 4 | 32523 |
| 5 | 67476 |
| 6 | 76567 |
| 7 | 4891729 |
| 8 | 5108270 |
| 9 | 8528093 |
| 10 | 71588335 |
| 11 | 98999900 |
| 12 | 399659933006 |
| 13 | 600340066993 |
| 14 | 723627738226 |
| 15 | 877712329767 |
| 16 | 998999999000 |
| 17 | 3485626998113 |
| 18 | 3787100274613 |
| 19 | 6212899725386 |
| 20 | 6514373001886 |