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 | 1 |
| 2 | 1451520 |
| 3 | 9170703360 |
| 4 | 3044058071040 |
| 5 | 457002000000000 |
| 6 | 13311459341107200 |
| 7 | 546914437209907200 |
| 8 | 6383852471797678080 |
| 9 | 95928796265538862080 |
| 10 | 663347543040000000000 |
| 11 | 7338585441586912128000 |
| 12 | 27916153580121646694400 |
| 13 | 245593958671812227742720 |
| 14 | 793857243898924498944000 |