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) |
|---|---|
| 9 | 1 |
| 10 | -9 |
| 11 | 36 |
| 12 | -84 |
| 13 | 117 |
| 14 | -54 |
| 15 | -177 |
| 16 | 540 |
| 17 | -837 |
| 18 | 755 |
| 19 | -54 |
| 20 | -1197 |
| 21 | 2535 |
| 22 | -3204 |
| 23 | 2520 |
| 24 | -246 |
| 25 | -3150 |
| 26 | 6426 |
| 27 | -8106 |
| 28 | 7011 |
| 29 | -2844 |
| 30 | -3549 |
| 31 | 10359 |
| 32 | -15120 |
| 33 | 15804 |
| 34 | -11403 |
| 35 | 2574 |
| 36 | 8610 |
| 37 | -18972 |
| 38 | 25425 |
| 39 | -25824 |
| 40 | 18954 |
| 41 | -6165 |
| 42 | -10080 |
| 43 | 25101 |
| 44 | -35262 |
| 45 | 37799 |
| 46 | -31374 |
| 47 | 17379 |
| 48 | 1929 |