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) |
|---|---|
| 0 | 6 |
| 1 | 20 |
| 2 | 48 |
| 3 | 112 |
| 4 | 320 |
| 5 | 1326 |
| 6 | 1400 |
| 7 | 4165 |
| 8 | 4374 |
| 9 | 10395 |
| 10 | 12852 |
| 11 | 15827 |
| 12 | 20412 |
| 13 | 23232 |
| 14 | 24300 |
| 15 | 24990 |
| 16 | 25000 |
| 17 | 27200 |
| 18 | 27300 |
| 19 | 31407 |
| 20 | 33660 |
| 21 | 34965 |
| 22 | 38480 |
| 23 | 41553 |
| 24 | 42525 |
| 25 | 50688 |
| 26 | 53508 |
| 27 | 65450 |
| 28 | 66000 |
| 29 | 68400 |
| 30 | 69498 |