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 | 1 |
| 3 | 0 |
| 4 | -1 |
| 5 | -3 |
| 6 | -4 |
| 7 | -6 |
| 8 | -8 |
| 9 | -10 |
| 10 | -11 |
| 11 | -13 |
| 12 | -15 |
| 13 | -18 |
| 14 | -20 |
| 15 | -21 |
| 16 | -22 |
| 17 | -24 |
| 18 | -26 |
| 19 | -29 |
| 20 | -32 |
| 21 | -34 |
| 22 | -35 |
| 23 | -37 |
| 24 | -39 |
| 25 | -41 |
| 26 | -42 |
| 27 | -43 |
| 28 | -44 |
| 29 | -46 |
| 30 | -49 |
| 31 | -53 |
| 32 | -57 |
| 33 | -60 |
| 34 | -62 |
| 35 | -63 |
| 36 | -64 |
| 37 | -66 |
| 38 | -67 |
| 39 | -67 |
| 40 | -67 |
| 41 | -68 |
| 42 | -70 |
| 43 | -73 |
| 44 | -76 |
| 45 | -79 |
| 46 | -81 |
| 47 | -84 |
| 48 | -87 |
| 49 | -90 |
| 50 | -93 |
| 51 | -95 |
| 52 | -97 |
| 53 | -100 |
| 54 | -103 |
| 55 | -105 |
| 56 | -107 |