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 | 40 |
| 2 | 624 |
| 3 | 3816 |
| 4 | 15040 |
| 5 | 45600 |
| 6 | 115920 |
| 7 | 259504 |
| 8 | 527616 |
| 9 | 994680 |
| 10 | 1764400 |
| 11 | 2976600 |
| 12 | 4814784 |
| 13 | 7514416 |
| 14 | 11371920 |
| 15 | 16754400 |
| 16 | 24110080 |
| 17 | 33979464 |
| 18 | 47007216 |
| 19 | 63954760 |
| 20 | 85713600 |
| 21 | 113319360 |
| 22 | 147966544 |
| 23 | 191024016 |
| 24 | 244051200 |
| 25 | 308815000 |
| 26 | 387307440 |