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 | 1 |
| 2 | 4 |
| 3 | 13228 |
| 4 | 19289 |
| 5 | 187838 |
| 6 | 201255 |
| 7 | 281771 |
| 8 | 308591 |
| 9 | 7391381 |
| 10 | 9041581 |
| 11 | 9124081 |
| 12 | 9589141 |
| 13 | 193690242024 |
| 14 | 254218445292 |
| 15 | 306676216538 |
| 16 | 375274847812 |
| 17 | 402512534123 |
| 18 | 423082506591 |
| 19 | 425477274579 |
| 20 | 443127377343 |
| 21 | 456962010177 |
| 22 | 458339382147 |
| 23 | 476155178309 |
| 24 | 480858185253 |
| 25 | 484213195281 |