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 | 2592 |
| 2 | 139968 |
| 3 | 995328 |
| 4 | 37340352 |
| 5 | 63700992 |
| 6 | 99574272 |
| 7 | 169869312 |
| 8 | 414720000 |
| 9 | 1399680000 |
| 10 | 4076863488 |
| 11 | 10871635968 |
| 12 | 17714700000 |
| 13 | 22781250000 |
| 14 | 25312500000 |
| 15 | 35888419872 |
| 16 | 51840000000 |
| 17 | 82012500000 |
| 18 | 98802571392 |
| 19 | 135304020000 |
| 20 | 136136700000 |
| 21 | 170749797552 |
| 22 | 174960000000 |
| 23 | 196730062848 |