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 | 0 |
| 3 | 1 |
| 4 | -1 |
| 5 | -1 |
| 6 | 1 |
| 7 | 2 |
| 8 | -3 |
| 9 | -3 |
| 10 | 1 |
| 11 | 3 |
| 12 | 20 |
| 13 | -3 |
| 14 | -6 |
| 15 | 1 |
| 16 | -44 |
| 17 | -29 |
| 18 | 80 |
| 19 | 5 |
| 20 | -10 |
| 21 | 1 |
| 22 | 145 |
| 23 | -399 |
| 24 | -354 |
| 25 | 205 |
| 26 | 30 |
| 27 | -15 |
| 28 | 1 |
| 29 | 714 |
| 30 | 3583 |
| 31 | -1155 |
| 32 | -1764 |
| 33 | 385 |
| 34 | 84 |
| 35 | -21 |
| 36 | 1 |
| 37 | -12103 |
| 38 | -4816 |
| 39 | 29014 |
| 40 | 1148 |
| 41 | -5929 |
| 42 | 532 |
| 43 | 182 |
| 44 | -28 |
| 45 | 1 |
| 46 | 51128 |
| 47 | -202887 |
| 48 | -163008 |
| 49 | 132726 |
| 50 | 23940 |
| 51 | -15561 |
| 52 | 420 |
| 53 | 342 |
| 54 | -36 |
| 55 | 1 |
| 56 | 520191 |
| 57 | 2267207 |
| 58 | -1085949 |
| 59 | -1450530 |