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) |
|---|---|
| 1 | -1 |
| 2 | 6 |
| 3 | -22 |
| 4 | 49 |
| 5 | -77 |
| 6 | 119 |
| 7 | -225 |
| 8 | 358 |
| 9 | -399 |
| 10 | 483 |
| 11 | -849 |
| 12 | 1139 |
| 13 | -1059 |
| 14 | 1349 |
| 15 | -2179 |
| 16 | 2500 |
| 17 | -2414 |
| 18 | 2885 |
| 19 | -3975 |
| 20 | 4971 |
| 21 | -4661 |
| 22 | 4663 |
| 23 | -7505 |
| 24 | 8819 |
| 25 | -6932 |
| 26 | 8454 |
| 27 | -11986 |
| 28 | 12438 |
| 29 | -11952 |
| 30 | 12744 |
| 31 | -17048 |
| 32 | 20399 |
| 33 | -16897 |
| 34 | 17501 |
| 35 | -25843 |
| 36 | 27904 |
| 37 | -22750 |
| 38 | 25270 |
| 39 | -36274 |
| 40 | 37184 |
| 41 | -31738 |