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 | 2 |
| 3 | 24 |
| 4 | 96 |
| 5 | 260 |
| 6 | 570 |
| 7 | 1092 |
| 8 | 1904 |
| 9 | 3096 |
| 10 | 4770 |
| 11 | 7040 |
| 12 | 10032 |
| 13 | 13884 |
| 14 | 18746 |
| 15 | 24780 |
| 16 | 32160 |
| 17 | 41072 |
| 18 | 51714 |
| 19 | 64296 |
| 20 | 79040 |
| 21 | 96180 |
| 22 | 115962 |
| 23 | 138644 |
| 24 | 164496 |
| 25 | 193800 |
| 26 | 226850 |
| 27 | 263952 |
| 28 | 305424 |
| 29 | 351596 |
| 30 | 402810 |
| 31 | 459420 |
| 32 | 521792 |
| 33 | 590304 |