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 | 36 |
| 2 | 1300 |
| 3 | 47700 |
| 4 | 1752148 |
| 5 | 64369764 |
| 6 | 2364812680 |
| 7 | 86878417604 |
| 8 | 3191736905988 |
| 9 | 117257942776700 |
| 10 | 4307819083344444 |
| 11 | 158260539240359944 |
| 12 | 5814171346741659592 |
| 13 | 213600867349885236600 |
| 14 | 7847262801829583566600 |
| 15 | 288292525423375500733688 |