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 | 2 |
| 2 | 257 |
| 3 | 1297 |
| 4 | 614657 |
| 5 | 331777 |
| 6 | 331777 |
| 7 | 160001 |
| 8 | 331777 |
| 9 | 9834497 |
| 10 | 5308417 |
| 11 | 8503057 |
| 12 | 5308417 |
| 13 | 9834497 |
| 14 | 65610001 |
| 15 | 5308417 |
| 16 | 8503057 |
| 17 | 40960001 |
| 18 | 65610001 |
| 19 | 29986577 |
| 20 | 384160001 |
| 21 | 40960001 |
| 22 | 303595777 |
| 23 | 1049760001 |
| 24 | 65610001 |
| 25 | 1944810001 |
| 26 | 3782742017 |
| 27 | 1944810001 |
| 28 | 1049760001 |