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 | 2 |
| 3 | 2 |
| 4 | -5 |
| 5 | 5 |
| 6 | 5 |
| 7 | 10 |
| 8 | 10 |
| 9 | 39 |
| 10 | -39 |
| 11 | -39 |
| 12 | -13 |
| 13 | 13 |
| 14 | 13 |
| 15 | 26 |
| 16 | 26 |
| 17 | -65 |
| 18 | 65 |
| 19 | 65 |
| 20 | 130 |
| 21 | 130 |
| 22 | -816 |
| 23 | 816 |
| 24 | 816 |
| 25 | 272 |
| 26 | -272 |
| 27 | -272 |
| 28 | -544 |
| 29 | -544 |
| 30 | 102 |
| 31 | -102 |
| 32 | -102 |
| 33 | -34 |
| 34 | 34 |
| 35 | 34 |
| 36 | 68 |
| 37 | 68 |
| 38 | -170 |
| 39 | 170 |
| 40 | 170 |
| 41 | 340 |
| 42 | 340 |
| 43 | 1326 |
| 44 | -1326 |
| 45 | -1326 |
| 46 | -442 |
| 47 | 442 |
| 48 | 442 |
| 49 | 884 |
| 50 | 884 |
| 51 | -2210 |
| 52 | 2210 |
| 53 | 2210 |