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 | 1 |
| 1 | 6 |
| 2 | 25 |
| 3 | 88 |
| 4 | 280 |
| 5 | 832 |
| 6 | 2352 |
| 7 | 6400 |
| 8 | 16896 |
| 9 | 43520 |
| 10 | 109824 |
| 11 | 272384 |
| 12 | 665600 |
| 13 | 1605632 |
| 14 | 3829760 |
| 15 | 9043968 |
| 16 | 21168128 |
| 17 | 49152000 |
| 18 | 113311744 |
| 19 | 259522560 |
| 20 | 590872576 |
| 21 | 1337982976 |
| 22 | 3014656000 |
| 23 | 6761218048 |
| 24 | 15099494400 |
| 25 | 33587986432 |
| 26 | 74440507392 |