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 | -3 |
| 2 | 6 |
| 3 | -7 |
| 4 | 3 |
| 5 | 6 |
| 6 | -17 |
| 7 | 24 |
| 8 | -21 |
| 9 | 6 |
| 10 | 21 |
| 11 | -54 |
| 12 | 77 |
| 13 | -72 |
| 14 | 24 |
| 15 | 64 |
| 16 | -159 |
| 17 | 216 |
| 18 | -190 |
| 19 | 57 |
| 20 | 159 |
| 21 | -392 |
| 22 | 534 |
| 23 | -468 |
| 24 | 144 |
| 25 | 381 |
| 26 | -924 |
| 27 | 1220 |
| 28 | -1044 |
| 29 | 312 |
| 30 | 833 |
| 31 | -1992 |
| 32 | 2625 |
| 33 | -2244 |
| 34 | 669 |
| 35 | 1746 |
| 36 | -4138 |
| 37 | 5382 |
| 38 | -4530 |
| 39 | 1332 |
| 40 | 3474 |
| 41 | -8184 |
| 42 | 10591 |
| 43 | -8886 |
| 44 | 2607 |
| 45 | 6724 |
| 46 | -15711 |