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 | 1 |
| 1 | 1 |
| 2 | 6 |
| 3 | 75 |
| 4 | 1565 |
| 5 | 48950 |
| 6 | 2145626 |
| 7 | 125727238 |
| 8 | 9507150815 |
| 9 | 902519025315 |
| 10 | 105203477607220 |
| 11 | 14786330708536422 |
| 12 | 2467862211341410635 |
| 13 | 482812610434512386665 |
| 14 | 109492763990117261581870 |