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 | 3 |
| 4 | 5 |
| 5 | 12 |
| 6 | 6 |
| 7 | -13 |
| 8 | 29 |
| 9 | 95 |
| 10 | -130 |
| 11 | -304 |
| 12 | 895 |
| 13 | 1050 |
| 14 | -5068 |
| 15 | -2181 |
| 16 | 27743 |
| 17 | -5481 |
| 18 | -143532 |
| 19 | 117983 |
| 20 | 700831 |
| 21 | -1074414 |
| 22 | -3163138 |
| 23 | 7872784 |
| 24 | 12585117 |
| 25 | -51587107 |
| 26 | -38040886 |
| 27 | 312988334 |
| 28 | 18178883 |
| 29 | -1779688404 |
| 30 | 1013771196 |
| 31 | 9485832411 |
| 32 | -11749675733 |
| 33 | -46878057651 |