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 | 34 |
| 4 | 1597 |
| 5 | 3524578 |
| 6 | 17167680177565 |
| 7 | 407305795904080553832073954 |
| 8 | 229265413057075367692743352179590077832064383222590237 |