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 | 20 |
| 3 | 74 |
| 4 | 347 |
| 5 | 1743 |
| 6 | 8385 |
| 7 | 44355 |
| 8 | 229952 |
| 9 | 1235489 |
| 10 | 6629026 |
| 11 | 37152645 |
| 12 | 202017712 |
| 13 | 1142393492 |
| 14 | 6333190658 |