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 | -3 |
| 3 | -6 |
| 4 | -1 |
| 5 | -15 |
| 6 | 15 |
| 7 | -28 |
| 8 | -3 |
| 9 | -9 |
| 10 | 35 |
| 11 | -66 |
| 12 | 6 |
| 13 | -91 |
| 14 | 63 |
| 15 | 60 |
| 16 | -9 |
| 17 | -153 |
| 18 | 27 |
| 19 | -190 |
| 20 | 15 |
| 21 | 105 |
| 22 | 143 |
| 23 | -276 |
| 24 | 21 |
| 25 | -100 |
| 26 | 195 |
| 27 | -54 |
| 28 | 28 |
| 29 | -435 |
| 30 | -75 |
| 31 | -496 |
| 32 | -27 |
| 33 | 231 |
| 34 | 323 |
| 35 | 210 |
| 36 | 18 |
| 37 | -703 |
| 38 | 399 |
| 39 | 312 |
| 40 | 55 |
| 41 | -861 |
| 42 | -105 |
| 43 | -946 |
| 44 | 66 |
| 45 | 135 |
| 46 | 575 |
| 47 | -1128 |
| 48 | 72 |
| 49 | -441 |
| 50 | 300 |
| 51 | 510 |
| 52 | 91 |
| 53 | -1431 |
| 54 | 189 |
| 55 | 440 |