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 | -10 |
| 3 | 10 |
| 4 | -5 |
| 5 | 1 |
| 6 | 35 |
| 7 | -170 |
| 8 | 415 |
| 9 | -629 |
| 10 | 630 |
| 11 | -420 |
| 12 | 180 |
| 13 | -45 |
| 14 | 5 |
| 15 | 285 |
| 16 | -2315 |
| 17 | 9381 |
| 18 | -24395 |
| 19 | 44625 |
| 20 | -59880 |
| 21 | 60015 |
| 22 | -45040 |
| 23 | 25025 |
| 24 | -10010 |
| 25 | 2730 |
| 26 | -455 |
| 27 | 35 |
| 28 | 2530 |
| 29 | -29379 |
| 30 | 169405 |
| 31 | -633675 |
| 32 | 1703700 |
| 33 | -3467145 |
| 34 | 5497640 |
| 35 | -6903325 |