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 | 561 |
| 2 | 2465 |
| 3 | 656601 |
| 4 | 1909001 |
| 5 | 174352641 |
| 6 | 230996949 |
| 7 | 275283401 |
| 8 | 939947009 |
| 9 | 1534274841 |
| 10 | 3264820001 |
| 11 | 5860426881 |
| 12 | 6025532241 |
| 13 | 25536531021 |
| 14 | 36709177121 |
| 15 | 53388707681 |
| 16 | 54519328481 |
| 17 | 56222911361 |
| 18 | 101536702401 |
| 19 | 105528976961 |
| 20 | 180481509681 |
| 21 | 196866607601 |
| 22 | 239862350001 |
| 23 | 329245587161 |
| 24 | 347469383801 |
| 25 | 347511324161 |