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 | 5 |
| 2 | 5 |
| 3 | -10 |
| 4 | -10 |
| 5 | 31 |
| 6 | 20 |
| 7 | -75 |
| 8 | -40 |
| 9 | 150 |
| 10 | 84 |
| 11 | -280 |
| 12 | -165 |
| 13 | 520 |
| 14 | 290 |
| 15 | -935 |
| 16 | -495 |
| 17 | 1595 |
| 18 | 855 |
| 19 | -2640 |
| 20 | -1424 |
| 21 | 4315 |
| 22 | 2265 |
| 23 | -6925 |
| 24 | -3570 |
| 25 | 10860 |
| 26 | 5605 |
| 27 | -16740 |
| 28 | -8615 |
| 29 | 25520 |
| 30 | 12984 |
| 31 | -38455 |
| 32 | -19390 |
| 33 | 57150 |
| 34 | 28740 |
| 35 | -83961 |
| 36 | -42110 |
| 37 | 122320 |