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 | 3 |
| 2 | 4 |
| 3 | 0 |
| 4 | -13 |
| 5 | -30 |
| 6 | -29 |
| 7 | 24 |
| 8 | 140 |
| 9 | 243 |
| 10 | 130 |
| 11 | -429 |
| 12 | -1348 |
| 13 | -1752 |
| 14 | 67 |
| 15 | 5346 |
| 16 | 11795 |
| 17 | 10608 |
| 18 | -11180 |
| 19 | -56541 |
| 20 | -93694 |
| 21 | -42525 |
| 22 | 182452 |
| 23 | 535440 |
| 24 | 660179 |
| 25 | -106782 |
| 26 | -2197373 |
| 27 | -4613112 |
| 28 | -3832996 |
| 29 | 5081235 |
| 30 | 22766722 |
| 31 | 36008115 |