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 | 7680 |
| 2 | 541624 |
| 3 | 30475714 |
| 4 | 470797744 |
| 5 | 4971575032 |
| 6 | 36636435714 |
| 7 | 215266489016 |
| 8 | 1008960229492 |
| 9 | 4090166833220 |
| 10 | 14277941121138 |
| 11 | 45489560699456 |
| 12 | 130575639288782 |
| 13 | 350906881230300 |
| 14 | 877498861912448 |
| 15 | 2086682953389618 |