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 | 8 |
| 2 | -6 |
| 3 | 48 |
| 4 | 15 |
| 5 | 168 |
| 6 | -26 |
| 7 | 496 |
| 8 | 51 |
| 9 | 1296 |
| 10 | -102 |
| 11 | 3072 |
| 12 | 172 |
| 13 | 6840 |
| 14 | -276 |
| 15 | 14448 |
| 16 | 453 |
| 17 | 29184 |
| 18 | -728 |
| 19 | 56880 |
| 20 | 1128 |
| 21 | 107472 |
| 22 | -1698 |
| 23 | 197616 |
| 24 | 2539 |
| 25 | 354888 |
| 26 | -3780 |
| 27 | 624048 |
| 28 | 5505 |
| 29 | 1076736 |
| 30 | -7882 |
| 31 | 1826416 |
| 32 | 11238 |
| 33 | 3050400 |
| 34 | -15918 |
| 35 | 5022720 |
| 36 | 22259 |
| 37 | 8163152 |
| 38 | -30810 |
| 39 | 13108224 |
| 40 | 42438 |
| 41 | 20814792 |
| 42 | -58110 |