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 | 0 |
| 1 | 1 |
| 2 | 1716 |
| 3 | 38760 |
| 4 | 296010 |
| 5 | 1344904 |
| 6 | 4496388 |
| 7 | 12271518 |
| 8 | 28989675 |
| 9 | 61474519 |
| 10 | 119877472 |
| 11 | 218618940 |
| 12 | 377447148 |
| 13 | 622614630 |
| 14 | 988172374 |
| 15 | 1517381580 |
| 16 | 2264243157 |
| 17 | 3295144749 |
| 18 | 4690625500 |
| 19 | 6547258432 |
| 20 | 8979650478 |
| 21 | 12122560170 |
| 22 | 16133132940 |
| 23 | 21193254160 |
| 24 | 27512019711 |