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 | 6969 |
| 2 | 19998 |
| 3 | 36399 |
| 4 | 39693 |
| 5 | 66099 |
| 6 | 69663 |
| 7 | 69897 |
| 8 | 89769 |
| 9 | 99363 |
| 10 | 99759 |
| 11 | 109989 |
| 12 | 118899 |
| 13 | 181998 |
| 14 | 191799 |
| 15 | 199089 |
| 16 | 297099 |
| 17 | 306939 |
| 18 | 333399 |
| 19 | 336963 |
| 20 | 339933 |
| 21 | 363099 |
| 22 | 396363 |
| 23 | 397998 |
| 24 | 399333 |
| 25 | 399729 |
| 26 | 588969 |
| 27 | 606666 |
| 28 | 606909 |
| 29 | 639633 |
| 30 | 660693 |
| 31 | 666633 |