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 | 11 |
| 2 | 121 |
| 3 | 948 |
| 4 | 6454 |
| 5 | 44693 |
| 6 | 321163 |
| 7 | 2343189 |
| 8 | 17087771 |
| 9 | 124218846 |
| 10 | 901767902 |
| 11 | 6546694983 |
| 12 | 47541956223 |
| 13 | 345294309121 |
| 14 | 2507850941319 |
| 15 | 18213891195978 |
| 16 | 132281285512572 |
| 17 | 960713718887517 |
| 18 | 6977351377339193 |
| 19 | 50674293382202763 |