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 | -3 |
| 4 | -3 |
| 5 | -3 |
| 6 | -5 |
| 7 | -7 |
| 8 | -6 |
| 9 | -6 |
| 10 | -10 |
| 11 | -12 |
| 12 | -11 |
| 13 | -13 |
| 14 | -17 |
| 15 | -20 |
| 16 | -21 |
| 17 | -21 |
| 18 | -27 |
| 19 | -34 |
| 20 | -33 |
| 21 | -36 |
| 22 | -46 |
| 23 | -51 |
| 24 | -53 |
| 25 | -58 |
| 26 | -68 |
| 27 | -78 |
| 28 | -82 |
| 29 | -89 |
| 30 | -104 |
| 31 | -118 |
| 32 | -123 |
| 33 | -131 |
| 34 | -154 |
| 35 | -171 |
| 36 | -179 |
| 37 | -197 |
| 38 | -221 |
| 39 | -245 |
| 40 | -262 |
| 41 | -279 |
| 42 | -314 |
| 43 | -349 |
| 44 | -369 |
| 45 | -398 |
| 46 | -446 |
| 47 | -486 |
| 48 | -515 |
| 49 | -557 |