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 | 390625 |
| 1 | 2562890625 |
| 2 | 152587890625 |
| 3 | 2251875390625 |
| 4 | 16815125390625 |
| 5 | 83733937890625 |
| 6 | 318644812890625 |
| 7 | 1001129150390625 |
| 8 | 2724905250390625 |
| 9 | 6634204312890625 |
| 10 | 14774554437890625 |
| 11 | 30590228625390625 |
| 12 | 59604644775390625 |
| 13 | 110324037687890625 |
| 14 | 195408755062890625 |
| 15 | 333160561500390625 |