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 | 0 |
| 2 | 1 |
| 3 | 0 |
| 4 | 0 |
| 5 | -1 |
| 6 | -1 |
| 7 | -3 |
| 8 | -3 |
| 9 | -5 |
| 10 | -6 |
| 11 | -8 |
| 12 | -9 |
| 13 | -12 |
| 14 | -13 |
| 15 | -16 |
| 16 | -18 |
| 17 | -21 |
| 18 | -23 |
| 19 | -27 |
| 20 | -29 |
| 21 | -33 |
| 22 | -36 |
| 23 | -40 |
| 24 | -43 |
| 25 | -48 |
| 26 | -51 |
| 27 | -56 |
| 28 | -60 |
| 29 | -65 |
| 30 | -69 |
| 31 | -75 |
| 32 | -79 |
| 33 | -85 |
| 34 | -90 |
| 35 | -96 |
| 36 | -101 |
| 37 | -108 |
| 38 | -113 |
| 39 | -120 |
| 40 | -126 |
| 41 | -133 |
| 42 | -139 |
| 43 | -147 |
| 44 | -153 |
| 45 | -161 |
| 46 | -168 |
| 47 | -176 |
| 48 | -183 |
| 49 | -192 |
| 50 | -199 |
| 51 | -208 |
| 52 | -216 |
| 53 | -225 |
| 54 | -233 |
| 55 | -243 |
| 56 | -251 |
| 57 | -261 |
| 58 | -270 |
| 59 | -280 |