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 | 13 |
| 2 | 655 |
| 3 | 71063 |
| 4 | 13237457 |
| 5 | 3748521653 |
| 6 | 1495006933759 |
| 7 | 796798642614895 |
| 8 | 546144645571635169 |
| 9 | 467512355698028529821 |
| 10 | 488384275088035513080239 |
| 11 | 611057820865315450415912327 |
| 12 | 901643505614430586911510015025 |
| 13 | 1548711768835068239482321088560837 |