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 | 16 |
| 3 | 98 |
| 4 | 643 |
| 5 | 5348 |
| 6 | 42167 |
| 7 | 335915 |
| 8 | 2975974 |
| 9 | 27237128 |
| 10 | 254712604 |
| 11 | 2518233755 |
| 12 | 25906520150 |
| 13 | 274611244775 |
| 14 | 3028044205471 |
| 15 | 34585700854386 |