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 | 0 |
| 2 | 1 |
| 3 | 99 |
| 4 | 1264 |
| 5 | 10475 |
| 6 | 44820 |
| 7 | 185626 |
| 8 | 546560 |
| 9 | 1454841 |
| 10 | 3640950 |
| 11 | 7868245 |
| 12 | 16042176 |
| 13 | 31040789 |
| 14 | 59796968 |
| 15 | 97525350 |
| 16 | 177090560 |
| 17 | 276689076 |
| 18 | 467100189 |
| 19 | 681356055 |
| 20 | 1096023200 |
| 21 | 1533162960 |
| 22 | 2426544252 |
| 23 | 3205401854 |
| 24 | 4885539840 |
| 25 | 6250705625 |
| 26 | 9431254430 |
| 27 | 11831779350 |