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 | 2 |
| 2 | 21 |
| 3 | 233 |
| 4 | 2584 |
| 5 | 28657 |
| 6 | 2178309 |
| 7 | 24157817 |
| 8 | 267914296 |
| 9 | 2971215073 |
| 10 | 20365011074 |
| 11 | 225851433717 |
| 12 | 2504730781961 |
| 13 | 27777890035288 |
| 14 | 2111485077978050 |
| 15 | 23416728348467685 |
| 16 | 259695496911122585 |
| 17 | 2880067194370816120 |