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 | 0 |
| 3 | -2 |
| 4 | -4 |
| 5 | -3 |
| 6 | 6 |
| 7 | 26 |
| 8 | 46 |
| 9 | 22 |
| 10 | -128 |
| 11 | -455 |
| 12 | -748 |
| 13 | -149 |
| 14 | 2948 |
| 15 | 9400 |
| 16 | 14254 |
| 17 | -1624 |
| 18 | -72876 |
| 19 | -212988 |
| 20 | -294316 |
| 21 | 143030 |
| 22 | 1889284 |
| 23 | 5104273 |
| 24 | 6328244 |
| 25 | -6017051 |
| 26 | -50569884 |
| 27 | -126812057 |
| 28 | -138104146 |
| 29 | 216071703 |
| 30 | 1383709740 |
| 31 | 3226295732 |
| 32 | 2992392698 |
| 33 | -7280984690 |