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 | 24 |
| 2 | 315 |
| 3 | 2080 |
| 4 | 8925 |
| 5 | 29016 |
| 6 | 77959 |
| 7 | 182400 |
| 8 | 384345 |
| 9 | 746200 |
| 10 | 1356531 |
| 11 | 2336544 |
| 12 | 3847285 |
| 13 | 6097560 |
| 14 | 9352575 |
| 15 | 13943296 |
| 16 | 20276529 |
| 17 | 28845720 |
| 18 | 40242475 |
| 19 | 55168800 |
| 20 | 74450061 |
| 21 | 99048664 |
| 22 | 130078455 |
| 23 | 168819840 |
| 24 | 216735625 |
| 25 | 275487576 |
| 26 | 346953699 |
| 27 | 433246240 |
| 28 | 536730405 |
| 29 | 660043800 |