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 | 29 |
| 1 | 113 |
| 2 | 1169 |
| 3 | 16913 |
| 4 | 264209 |
| 5 | 4202513 |
| 6 | 67141649 |
| 7 | 1073872913 |
| 8 | 17180393489 |
| 9 | 274880004113 |
| 10 | 4398054899729 |
| 11 | 70368777732113 |
| 12 | 1125900041060369 |
| 13 | 18014399046352913 |
| 14 | 288230378299195409 |
| 15 | 4611686027017322513 |
| 16 | 73786976329197944849 |
| 17 | 1180591620854850256913 |