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 | 1 |
| 3 | -2 |
| 4 | 1 |
| 5 | 8 |
| 6 | -11 |
| 7 | -41 |
| 8 | -127 |
| 9 | 107 |
| 10 | -639 |
| 11 | -1372 |
| 12 | -3695 |
| 13 | 514 |
| 14 | -25983 |
| 15 | -26339 |
| 16 | -70655 |
| 17 | -46299 |
| 18 | -430955 |
| 19 | -484134 |
| 20 | -2808479 |
| 21 | 93148 |
| 22 | -5032895 |
| 23 | -17319181 |
| 24 | -72165695 |
| 25 | 43371103 |
| 26 | -171203135 |
| 27 | -378398576 |
| 28 | -148383647 |
| 29 | -2605023034 |
| 30 | -3368133419 |
| 31 | 11479942073 |
| 32 | -11902375935 |
| 33 | 2021161097 |
| 34 | -708801692671 |