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 | 1 |
| 2 | 2 |
| 3 | 2 |
| 4 | 9 |
| 5 | 2 |
| 6 | 13 |
| 7 | 60 |
| 8 | -12 |
| 9 | 68 |
| 10 | 76 |
| 11 | 525 |
| 12 | -300 |
| 13 | 774 |
| 14 | 132 |
| 15 | 789 |
| 16 | 5670 |
| 17 | -5250 |
| 18 | 11820 |
| 19 | -3636 |
| 20 | 6702 |
| 21 | 7734 |
| 22 | 72765 |
| 23 | -92610 |
| 24 | 212415 |
| 25 | -143340 |
| 26 | 143307 |
| 27 | 19086 |
| 28 | 110937 |
| 29 | 1081080 |
| 30 | -1746360 |
| 31 | 4286520 |
| 32 | -4246200 |
| 33 | 4156200 |
| 34 | -1204200 |
| 35 | 1305000 |
| 36 | 1528920 |