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 | 24 |
| 2 | 556 |
| 3 | 9540 |
| 4 | 173860 |
| 5 | 3065704 |
| 6 | 56438584 |
| 7 | 1004305424 |
| 8 | 18465834580 |
| 9 | 335571341040 |
| 10 | 6219202151476 |
| 11 | 114039550489064 |
| 12 | 2121345108007408 |
| 13 | 39325546973748384 |
| 14 | 735898709559550484 |
| 15 | 13729000925046178840 |
| 16 | 257888578347427756340 |