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 | 2187 |
| 2 | 279936 |
| 3 | 2710892 |
| 4 | 11704964 |
| 5 | 37433596 |
| 6 | 107694133 |
| 7 | 300892325 |
| 8 | 834305212 |
| 9 | 2288859662 |
| 10 | 6150132424 |
| 11 | 16041429234 |
| 12 | 40392369273 |
| 13 | 97941685953 |
| 14 | 228592108824 |
| 15 | 513973817853 |
| 16 | 1114992467592 |
| 17 | 2338135911280 |
| 18 | 4749060805124 |
| 19 | 9361861348424 |