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 | -1 |
| 2 | -4 |
| 3 | -5 |
| 4 | -7 |
| 5 | 27 |
| 6 | 17 |
| 7 | 167 |
| 8 | 110 |
| 9 | -42 |
| 10 | 10 |
| 11 | -706 |
| 12 | -4001 |
| 13 | -3915 |
| 14 | 3079 |
| 15 | -18640 |
| 16 | 9869 |
| 17 | 21403 |
| 18 | 130565 |
| 19 | 107250 |
| 20 | -15661 |
| 21 | 420664 |
| 22 | 599540 |
| 23 | -161785 |
| 24 | -1232833 |
| 25 | -5836888 |
| 26 | -5129796 |
| 27 | 6516714 |
| 28 | -29068180 |
| 29 | -14953045 |
| 30 | -41490510 |
| 31 | 20261320 |
| 32 | 30395771 |
| 33 | 441235155 |
| 34 | 205289550 |