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 | -1 |
| 2 | -3 |
| 3 | -6 |
| 4 | 0 |
| 5 | 11 |
| 6 | 42 |
| 7 | 63 |
| 8 | 73 |
| 9 | -45 |
| 10 | -267 |
| 11 | -720 |
| 12 | -1095 |
| 13 | -1239 |
| 14 | -66 |
| 15 | 2794 |
| 16 | 8757 |
| 17 | 16017 |
| 18 | 22885 |
| 19 | 19634 |
| 20 | -2359 |
| 21 | -61979 |
| 22 | -161867 |
| 23 | -302190 |
| 24 | -421971 |
| 25 | -432051 |
| 26 | -126712 |
| 27 | 690578 |
| 28 | 2278273 |
| 29 | 4584989 |
| 30 | 7269985 |
| 31 | 8965464 |
| 32 | 7515373 |
| 33 | -845659 |
| 34 | -19930400 |
| 35 | -53474765 |
| 36 | -100195759 |