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 | 139 |
| 2 | 887 |
| 3 | 4297 |
| 4 | 19333 |
| 5 | 31907 |
| 6 | 43331 |
| 7 | 173359 |
| 8 | 542603 |
| 9 | 404851 |
| 10 | 396733 |
| 11 | 1468277 |
| 12 | 1895359 |
| 13 | 5518687 |
| 14 | 7621259 |
| 15 | 13626257 |
| 16 | 33803689 |
| 17 | 27915737 |
| 18 | 17051707 |
| 19 | 142414669 |
| 20 | 378043979 |
| 21 | 20831323 |
| 22 | 47326693 |
| 23 | 607010093 |
| 24 | 391995431 |
| 25 | 387096133 |
| 26 | 944192807 |