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 | 72 |
| 2 | 912 |
| 3 | 5336 |
| 4 | 20256 |
| 5 | 58728 |
| 6 | 142000 |
| 7 | 301560 |
| 8 | 581184 |
| 9 | 1038984 |
| 10 | 1749456 |
| 11 | 2805528 |
| 12 | 4320608 |
| 13 | 6430632 |
| 14 | 9296112 |
| 15 | 13104184 |
| 16 | 18070656 |
| 17 | 24442056 |
| 18 | 32497680 |
| 19 | 42551640 |
| 20 | 54954912 |
| 21 | 70097384 |
| 22 | 88409904 |
| 23 | 110366328 |
| 24 | 136485568 |
| 25 | 167333640 |
| 26 | 203525712 |
| 27 | 245728152 |
| 28 | 294660576 |