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 | 13 |
| 2 | 661 |
| 3 | 8317 |
| 4 | 12829 |
| 5 | 586153 |
| 6 | 1081417 |
| 7 | 7790917 |
| 8 | 7790917 |
| 9 | 370861009 |
| 10 | 370861009 |
| 11 | 370861009 |
| 12 | 5637496849 |
| 13 | 289391626057 |
| 14 | 469257742237 |
| 15 | 628337233501 |
| 16 | 84424712545429 |
| 17 | 155494152002017 |
| 18 | 341821313785729 |