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) |
|---|---|
| 0 | 2 |
| 1 | 13 |
| 2 | 11 |
| 3 | 1093 |
| 4 | 757 |
| 5 | 3851 |
| 6 | 797161 |
| 7 | 4561 |
| 8 | 34511 |
| 9 | 363889 |
| 10 | 368089 |
| 11 | 1001523179 |
| 12 | 391151 |
| 13 | 8209 |
| 14 | 20381027 |
| 15 | 4404047 |
| 16 | 2413941289 |
| 17 | 2664097031 |
| 18 | 17189128703 |
| 19 | 797161 |
| 20 | 86950696619 |
| 21 | 380808546861411923 |
| 22 | 927001 |
| 23 | 96656723 |
| 24 | 131713 |
| 25 | 99810171997 |