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 | 2 |
| 1 | 1 |
| 2 | -7 |
| 3 | -11 |
| 4 | 17 |
| 5 | 61 |
| 6 | -7 |
| 7 | -251 |
| 8 | -223 |
| 9 | 781 |
| 10 | 1673 |
| 11 | -1451 |
| 12 | -8143 |
| 13 | -2339 |
| 14 | 30233 |
| 15 | 39589 |
| 16 | -81343 |
| 17 | -239699 |
| 18 | 85673 |
| 19 | 1044469 |
| 20 | 701777 |
| 21 | -3476099 |
| 22 | -6283207 |
| 23 | 7621189 |
| 24 | 32754017 |
| 25 | 2269261 |
| 26 | -128746807 |
| 27 | -137823851 |
| 28 | 377163377 |
| 29 | 928458781 |
| 30 | -580194727 |
| 31 | -4294029851 |
| 32 | -1973250943 |