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 | 2 |
| 3 | 2 |
| 4 | 3 |
| 5 | 5 |
| 6 | 3 |
| 7 | 3 |
| 8 | 4 |
| 9 | 1 |
| 10 | 9 |
| 11 | 9 |
| 12 | 3 |
| 13 | 5 |
| 14 | -9 |
| 15 | 1 |
| 16 | 2 |
| 17 | 4 |
| 18 | 25 |
| 19 | 25 |
| 20 | 63 |
| 21 | -13 |
| 22 | -75 |
| 23 | -75 |
| 24 | -89 |
| 25 | -26 |
| 26 | 102 |
| 27 | 296 |
| 28 | 122 |
| 29 | 124 |
| 30 | -58 |
| 31 | -58 |
| 32 | -57 |
| 33 | -741 |
| 34 | -229 |
| 35 | -471 |
| 36 | 288 |
| 37 | 290 |
| 38 | -732 |
| 39 | 1302 |
| 40 | 1472 |
| 41 | 1474 |
| 42 | 2824 |
| 43 | 2824 |
| 44 | -542 |
| 45 | -4556 |
| 46 | -8650 |
| 47 | -8650 |
| 48 | -8680 |
| 49 | -9783 |
| 50 | -1320 |
| 51 | 17818 |
| 52 | 32016 |
| 53 | 32018 |
| 54 | 20252 |
| 55 | 9054 |
| 56 | 7360 |