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 | 0 |
| 2 | -2 |
| 3 | -3 |
| 4 | 2 |
| 5 | 15 |
| 6 | 19 |
| 7 | -28 |
| 8 | -134 |
| 9 | -129 |
| 10 | 353 |
| 11 | 1254 |
| 12 | 791 |
| 13 | -4238 |
| 14 | -11818 |
| 15 | -3123 |
| 16 | 49162 |
| 17 | 110007 |
| 18 | -17783 |
| 19 | -554458 |
| 20 | -996323 |
| 21 | 690932 |
| 22 | 6096792 |
| 23 | 8624747 |
| 24 | -12287153 |
| 25 | -65419110 |
| 26 | -69285296 |
| 27 | 178655307 |
| 28 | 684550946 |
| 29 | 483569751 |
| 30 | -2354830741 |
| 31 | -6970706252 |
| 32 | -2324044054 |
| 33 | 29195280375 |
| 34 | 68793790705 |