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 | 0 |
| 2 | 30 |
| 3 | 5 |
| 4 | 120 |
| 5 | 133 |
| 6 | 15 |
| 7 | 14 |
| 8 | 11 |
| 9 | 5 |
| 10 | 7680 |
| 11 | 968 |
| 12 | 18 |
| 13 | 243 |
| 14 | 26 |
| 15 | 5 |
| 16 | 9 |
| 17 | 1844434621273219148118716000949433592399169477194046126 |
| 18 | 8 |
| 19 | 22173201293492286974730770140 |
| 20 | 51 |
| 21 | 5 |
| 22 | 593 |
| 23 | 5885 |
| 24 | 41 |
| 25 | 112 |
| 26 | 15 |
| 27 | 5 |
| 28 | 23 |