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 | 2 |
| 3 | 23 |
| 4 | 247 |
| 5 | 699 |
| 6 | 55921 |
| 7 | 70936 |
| 8 | 152730 |
| 9 | 478017 |
| 10 | 4879815 |
| 11 | 12909834588 |
| 12 | 223070292558 |
| 13 | 583407686653 |
| 14 | 601718433498 |