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 | 16 |
| 2 | 270 |
| 3 | 5148 |
| 4 | 110929 |
| 5 | 2677008 |
| 6 | 71648322 |
| 7 | 2107966432 |
| 8 | 67649839664 |
| 9 | 2352412120760 |
| 10 | 88122951915388 |
| 11 | 3538364803586104 |
| 12 | 151611580761978784 |
| 13 | 6905283671128114400 |
| 14 | 333151832685664811338 |
| 15 | 16973306740660778801468 |