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 | 6 |
| 2 | 36 |
| 3 | 60 |
| 4 | 100 |
| 5 | 240 |
| 6 | 576 |
| 7 | 1296 |
| 8 | 2916 |
| 9 | 6804 |
| 10 | 15876 |
| 11 | 36288 |
| 12 | 82944 |
| 13 | 191808 |
| 14 | 443556 |
| 15 | 1018980 |
| 16 | 2340900 |
| 17 | 5397840 |
| 18 | 12446784 |
| 19 | 28640304 |
| 20 | 65901924 |
| 21 | 151822836 |
| 22 | 349764804 |
| 23 | 805233312 |
| 24 | 1853819136 |
| 25 | 4269519072 |
| 26 | 9833102244 |
| 27 | 22641659460 |
| 28 | 52134588900 |