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 | 1 |
| 4 | 4 |
| 5 | 2 |
| 6 | 4 |
| 7 | -1 |
| 8 | 9 |
| 9 | 3 |
| 10 | 11 |
| 11 | -4 |
| 12 | 17 |
| 13 | -2 |
| 14 | 11 |
| 15 | -24 |
| 16 | 31 |
| 17 | -3 |
| 18 | 39 |
| 19 | -35 |
| 20 | 70 |
| 21 | -14 |
| 22 | 47 |
| 23 | -107 |
| 24 | 112 |
| 25 | -27 |
| 26 | 122 |
| 27 | -163 |
| 28 | 198 |
| 29 | -90 |
| 30 | 93 |
| 31 | -409 |
| 32 | 282 |
| 33 | -108 |
| 34 | 329 |
| 35 | -487 |
| 36 | 601 |
| 37 | -160 |
| 38 | 324 |
| 39 | -1076 |
| 40 | 835 |
| 41 | -165 |
| 42 | 907 |
| 43 | -1298 |
| 44 | 1478 |
| 45 | -429 |
| 46 | 565 |
| 47 | -2973 |
| 48 | 1745 |
| 49 | -427 |
| 50 | 1999 |
| 51 | -3149 |
| 52 | 3587 |
| 53 | -528 |