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 | 4 |
| 2 | 112 |
| 3 | 3444 |
| 4 | 114720 |
| 5 | 3883684 |
| 6 | 131852560 |
| 7 | 4478648724 |
| 8 | 152139554112 |
| 9 | 5168250745924 |
| 10 | 175568295786160 |
| 11 | 5964153281301684 |
| 12 | 202605640210401120 |
| 13 | 6882627596048598244 |
| 14 | 233806732521557580112 |
| 15 | 7942546277531426709204 |
| 16 | 269812766700017940393600 |
| 17 | 9165691521502509968254084 |