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 | 2 |
| 2 | 4 |
| 3 | 8 |
| 4 | 8 |
| 5 | 22 |
| 6 | -6 |
| 7 | 72 |
| 8 | -92 |
| 9 | 266 |
| 10 | -426 |
| 11 | 838 |
| 12 | -1172 |
| 13 | 1432 |
| 14 | -398 |
| 15 | -3614 |
| 16 | 15140 |
| 17 | -41274 |
| 18 | 95126 |
| 19 | -195698 |
| 20 | 370876 |
| 21 | -652384 |
| 22 | 1063442 |
| 23 | -1570116 |
| 24 | 1961852 |
| 25 | -1560168 |
| 26 | -1401888 |
| 27 | 11023226 |
| 28 | -36000318 |
| 29 | 93408538 |
| 30 | -214275608 |
| 31 | 450374202 |
| 32 | -879254356 |
| 33 | 1599245876 |
| 34 | -2695464868 |
| 35 | 4138070460 |
| 36 | -5539280974 |