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 | 1 |
| 1 | 2 |
| 2 | 5 |
| 3 | 2 |
| 4 | 13 |
| 5 | 163 |
| 6 | 103 |
| 7 | 137 |
| 8 | 863 |
| 9 | 98641 |
| 10 | 10687 |
| 11 | 31469 |
| 12 | 1540901 |
| 13 | 522787 |
| 14 | 5441 |
| 15 | 226871807 |
| 16 | 13619 |
| 17 | 1276861 |
| 18 | 414026539 |
| 19 | 2124467 |
| 20 | 12670743557 |
| 21 | 838025081381 |
| 22 | 44659157 |
| 23 | 323895443 |
| 24 | 337310723185584470837549 |
| 25 | 54352957 |
| 26 | 11301647941785046703319941 |
| 27 | 102505951982728548829 |