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 | 0 |
| 1 | 1 |
| 2 | 134775814 |
| 3 | -596792289 |
| 4 | 870078620 |
| 5 | 1172187917 |
| 6 | -1410233534 |
| 7 | 1368768587 |
| 8 | 694906232 |
| 9 | 1598751577 |
| 10 | 1828254910 |
| 11 | 352239543 |
| 12 | 2039224980 |
| 13 | 303092965 |
| 14 | -683524998 |
| 15 | 256513635 |
| 16 | 1259699184 |
| 17 | -355259471 |
| 18 | 1580146294 |
| 19 | -967806897 |
| 20 | 1408429452 |
| 21 | -1298476099 |
| 22 | -669280590 |