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 | 3 |
| 4 | 5 |
| 5 | -22 |
| 6 | 27 |
| 7 | 28 |
| 8 | -163 |
| 9 | 235 |
| 10 | 134 |
| 11 | -1188 |
| 12 | 1983 |
| 13 | 408 |
| 14 | -8504 |
| 15 | 16320 |
| 16 | -1551 |
| 17 | -59659 |
| 18 | 131507 |
| 19 | -46683 |
| 20 | -408806 |
| 21 | 1040147 |
| 22 | -612380 |
| 23 | -2721835 |
| 24 | 8088003 |
| 25 | -6523626 |
| 26 | -17457420 |
| 27 | 61883839 |
| 28 | -62900496 |
| 29 | -106248240 |
| 30 | 466069760 |
| 31 | -571001695 |
| 32 | -595520019 |
| 33 | 3454539427 |