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 | 15 |
| 3 | 124 |
| 4 | 2431 |
| 5 | 68766 |
| 6 | 3025596 |
| 7 | 173773496 |
| 8 | 12786773247 |
| 9 | 1169623901221 |
| 10 | 130305653188890 |
| 11 | 17376934722757908 |
| 12 | 2733655198336260124 |
| 13 | 501034099176714376118 |
| 14 | 105847486572700895182728 |
| 15 | 25534322201330399433420024 |
| 16 | 6976464857439636995547805183 |