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 | 3 |
| 1 | -1 |
| 2 | -1 |
| 3 | 5 |
| 4 | -5 |
| 5 | -1 |
| 6 | 11 |
| 7 | -15 |
| 8 | 3 |
| 9 | 23 |
| 10 | -41 |
| 11 | 21 |
| 12 | 43 |
| 13 | -105 |
| 14 | 83 |
| 15 | 65 |
| 16 | -253 |
| 17 | 271 |
| 18 | 47 |
| 19 | -571 |
| 20 | 795 |
| 21 | -177 |
| 22 | -1189 |
| 23 | 2161 |
| 24 | -1149 |
| 25 | -2201 |
| 26 | 5511 |
| 27 | -4459 |
| 28 | -3253 |
| 29 | 13223 |
| 30 | -14429 |
| 31 | -2047 |
| 32 | 29699 |
| 33 | -42081 |
| 34 | 10335 |
| 35 | 61445 |
| 36 | -113861 |
| 37 | 62751 |
| 38 | 112555 |
| 39 | -289167 |
| 40 | 239363 |
| 41 | 162359 |
| 42 | -690889 |
| 43 | 767893 |
| 44 | 85355 |