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 | 0 |
| 1 | 1 |
| 2 | 35 |
| 3 | 405 |
| 4 | 2584 |
| 5 | 11375 |
| 6 | 38961 |
| 7 | 111475 |
| 8 | 278720 |
| 9 | 627669 |
| 10 | 1300375 |
| 11 | 2516921 |
| 12 | 4604040 |
| 13 | 8030035 |
| 14 | 13446629 |
| 15 | 21738375 |
| 16 | 34080256 |
| 17 | 52004105 |
| 18 | 77474475 |
| 19 | 112974589 |
| 20 | 161603000 |
| 21 | 227181591 |
| 22 | 314375545 |
| 23 | 428825915 |
| 24 | 577295424 |
| 25 | 767828125 |
| 26 | 1009923551 |
| 27 | 1314725985 |
| 28 | 1695229480 |
| 29 | 2166499259 |