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 | 1 |
| 3 | 11 |
| 4 | -8 |
| 5 | 1 |
| 6 | -50 |
| 7 | 58 |
| 8 | -15 |
| 9 | 1 |
| 10 | 274 |
| 11 | -444 |
| 12 | 177 |
| 13 | -24 |
| 14 | 1 |
| 15 | -1764 |
| 16 | 3708 |
| 17 | -2016 |
| 18 | 416 |
| 19 | -35 |
| 20 | 1 |
| 21 | 13068 |
| 22 | -33984 |
| 23 | 23544 |
| 24 | -6560 |
| 25 | 835 |
| 26 | -48 |
| 27 | 1 |
| 28 | -109584 |
| 29 | 341136 |
| 30 | -288360 |
| 31 | 101560 |
| 32 | -17370 |
| 33 | 1506 |
| 34 | -63 |
| 35 | 1 |
| 36 | 1026576 |
| 37 | -3733920 |
| 38 | 3736440 |
| 39 | -1595040 |
| 40 | 343410 |
| 41 | -39900 |
| 42 | 2513 |
| 43 | -80 |
| 44 | 1 |