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 | 24 |
| 1 | 97 |
| 2 | 4680 |
| 3 | 18817 |
| 4 | 907896 |
| 5 | 3650401 |
| 6 | 176127144 |
| 7 | 708158977 |
| 8 | 34167758040 |
| 9 | 137379191137 |
| 10 | 6628368932616 |
| 11 | 26650854921601 |
| 12 | 1285869405169464 |
| 13 | 5170128475599457 |
| 14 | 249452036233943400 |
| 15 | 1002978273411373057 |