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 | 12 |
| 2 | 48 |
| 3 | 288 |
| 4 | 1344 |
| 5 | 6828 |
| 6 | 32892 |
| 7 | 159612 |
| 8 | 766356 |
| 9 | 3671076 |
| 10 | 17521560 |
| 11 | 83440932 |
| 12 | 396541656 |
| 13 | 1881162084 |
| 14 | 8909612856 |
| 15 | 42136382208 |
| 16 | 199020641232 |
| 17 | 938971412124 |
| 18 | 4425660916764 |