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 | 1 |
| 4 | 2 |
| 5 | 2 |
| 6 | 3 |
| 7 | 2 |
| 8 | 4 |
| 9 | 3 |
| 10 | 4 |
| 11 | 2 |
| 12 | 3 |
| 13 | -1 |
| 14 | -1 |
| 15 | -6 |
| 16 | -9 |
| 17 | -17 |
| 18 | -22 |
| 19 | -35 |
| 20 | -43 |
| 21 | -61 |
| 22 | -76 |
| 23 | -100 |
| 24 | -121 |
| 25 | -155 |
| 26 | -185 |
| 27 | -229 |
| 28 | -271 |
| 29 | -328 |
| 30 | -383 |
| 31 | -458 |
| 32 | -529 |
| 33 | -622 |
| 34 | -715 |
| 35 | -830 |
| 36 | -946 |
| 37 | -1090 |
| 38 | -1233 |
| 39 | -1407 |
| 40 | -1584 |
| 41 | -1794 |
| 42 | -2008 |
| 43 | -2261 |
| 44 | -2517 |
| 45 | -2816 |
| 46 | -3124 |
| 47 | -3476 |
| 48 | -3838 |
| 49 | -4253 |
| 50 | -4677 |
| 51 | -5159 |
| 52 | -5656 |
| 53 | -6213 |