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 | 1 |
| 2 | 5 |
| 3 | 26 |
| 4 | 179 |
| 5 | 1600 |
| 6 | 18299 |
| 7 | 258850 |
| 8 | 4407623 |
| 9 | 88463546 |
| 10 | 2056904519 |
| 11 | 54625874590 |
| 12 | 1637606381371 |
| 13 | 54871264668362 |