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 | 1 |
| 2 | 16 |
| 3 | 144 |
| 4 | 256 |
| 5 | 1296 |
| 6 | 2304 |
| 7 | 20736 |
| 8 | 57600 |
| 9 | 331776 |
| 10 | 518400 |
| 11 | 2822400 |
| 12 | 8294400 |
| 13 | 12960000 |
| 14 | 25401600 |
| 15 | 132710400 |
| 16 | 207360000 |
| 17 | 228614400 |
| 18 | 406425600 |
| 19 | 635040000 |
| 20 | 2057529600 |
| 21 | 3073593600 |
| 22 | 6502809600 |
| 23 | 10160640000 |
| 24 | 27662342400 |
| 25 | 31116960000 |
| 26 | 51438240000 |
| 27 | 76839840000 |
| 28 | 248961081600 |