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 | 3 |
| 2 | 5 |
| 3 | 549755813881 |
| 4 | 17 |
| 5 | 97 |
| 6 | 193 |
| 7 | 140737488355201 |
| 8 | 257 |
| 9 | 7681 |
| 10 | 15361 |
| 11 | 134215681 |
| 12 | 12289 |
| 13 | 8380417 |
| 14 | 114689 |