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) |
|---|---|
| 0 | 2187 |
| 1 | 4782969 |
| 2 | 170859375 |
| 3 | 1801088541 |
| 4 | 10460353203 |
| 5 | 42618442977 |
| 6 | 137231006679 |
| 7 | 373669453125 |
| 8 | 897410677851 |
| 9 | 1954897493193 |
| 10 | 3938980639167 |
| 11 | 7446353252589 |
| 12 | 13348388671875 |
| 13 | 22876792454961 |
| 14 | 37725479487783 |
| 15 | 60170087060757 |
| 16 | 93206534790699 |
| 17 | 140710042265625 |
| 18 | 207616015289871 |