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 | 144 |
| 3 | 3240 |
| 4 | 14256 |
| 5 | 37470 |
| 6 | 77184 |
| 7 | 137754 |
| 8 | 223536 |
| 9 | 338886 |
| 10 | 488160 |
| 11 | 675714 |
| 12 | 905904 |
| 13 | 1183086 |
| 14 | 1511616 |
| 15 | 1895850 |
| 16 | 2340144 |
| 17 | 2848854 |
| 18 | 3426336 |
| 19 | 4076946 |
| 20 | 4805040 |
| 21 | 5614974 |
| 22 | 6511104 |
| 23 | 7497786 |
| 24 | 8579376 |
| 25 | 9760230 |
| 26 | 11044704 |
| 27 | 12437154 |
| 28 | 13941936 |
| 29 | 15563406 |