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 | 30 |
| 2 | 925 |
| 3 | 32400 |
| 4 | 1298605 |
| 5 | 59069010 |
| 6 | 3016869625 |
| 7 | 171258433500 |
| 8 | 10708492743025 |
| 9 | 731776512817350 |
| 10 | 54281160516507925 |
| 11 | 4344836976344865000 |
| 12 | 373343787685538795125 |
| 13 | 34283431717422205568250 |
| 14 | 3350860422355179821712625 |
| 15 | 347355560922824645523832500 |