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 | 0 |
| 2 | 31536000 |
| 3 | 63072000 |
| 4 | 94694400 |
| 5 | 126230400 |
| 6 | 157766400 |
| 7 | 189302400 |
| 8 | 220924800 |
| 9 | 252460800 |
| 10 | 283996800 |
| 11 | 315532800 |
| 12 | 347155200 |
| 13 | 378691200 |
| 14 | 410227200 |
| 15 | 441763200 |
| 16 | 473385600 |
| 17 | 504921600 |
| 18 | 536457600 |
| 19 | 567993600 |
| 20 | 599616000 |
| 21 | 631152000 |
| 22 | 662688000 |
| 23 | 694224000 |
| 24 | 725846400 |
| 25 | 757382400 |