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) |
|---|---|
| 2 | 7 |
| 3 | 75 |
| 4 | 385 |
| 5 | 1365 |
| 6 | 3850 |
| 7 | 9282 |
| 8 | 19950 |
| 9 | 39270 |
| 10 | 72105 |
| 11 | 125125 |
| 12 | 207207 |
| 13 | 329875 |
| 14 | 507780 |
| 15 | 759220 |
| 16 | 1106700 |
| 17 | 1577532 |
| 18 | 2204475 |
| 19 | 3026415 |
| 20 | 4089085 |
| 21 | 5445825 |
| 22 | 7158382 |
| 23 | 9297750 |
| 24 | 11945050 |
| 25 | 15192450 |
| 26 | 19144125 |
| 27 | 23917257 |