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 | 4 |
| 2 | 17 |
| 3 | 101 |
| 4 | 670 |
| 5 | 4675 |
| 6 | 34425 |
| 7 | 262549 |
| 8 | 2051466 |
| 9 | 16312743 |
| 10 | 131464721 |
| 11 | 1071368863 |
| 12 | 8809580516 |
| 13 | 72986908554 |
| 14 | 608542410004 |