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 | 29 |
| 3 | 59 |
| 4 | 149 |
| 5 | 179 |
| 6 | 239 |
| 7 | 269 |
| 8 | 599 |
| 9 | 809 |
| 10 | 1619 |
| 11 | 2999 |
| 12 | 4049 |
| 13 | 4799 |
| 14 | 8999 |
| 15 | 9719 |
| 16 | 15359 |
| 17 | 21599 |
| 18 | 23039 |
| 19 | 33749 |
| 20 | 138239 |
| 21 | 179999 |
| 22 | 281249 |
| 23 | 345599 |
| 24 | 737279 |
| 25 | 3455999 |
| 26 | 6143999 |
| 27 | 6560999 |
| 28 | 10124999 |
| 29 | 13668749 |
| 30 | 15551999 |
| 31 | 17495999 |
| 32 | 20995199 |
| 33 | 22118399 |
| 34 | 23999999 |