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 | 1 |
| 2 | 16 |
| 3 | 199 |
| 4 | 2272 |
| 5 | 25009 |
| 6 | 270640 |
| 7 | 2904727 |
| 8 | 31049152 |
| 9 | 331216993 |
| 10 | 3529670224 |
| 11 | 37595354983 |
| 12 | 400334476960 |
| 13 | 4262416397329 |
| 14 | 45379597170544 |
| 15 | 483115820080951 |
| 16 | 5143216082574208 |
| 17 | 54753855576573121 |
| 18 | 582898372518440080 |