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 | -5 |
| 4 | -7 |
| 5 | 1 |
| 6 | 23 |
| 7 | 43 |
| 8 | 17 |
| 9 | -95 |
| 10 | -241 |
| 11 | -197 |
| 12 | 329 |
| 13 | 1249 |
| 14 | 1511 |
| 15 | -725 |
| 16 | -5983 |
| 17 | -9791 |
| 18 | -1633 |
| 19 | 26107 |
| 20 | 57113 |
| 21 | 35905 |
| 22 | -99529 |
| 23 | -306773 |
| 24 | -314959 |
| 25 | 290401 |
| 26 | 1525679 |
| 27 | 2180155 |
| 28 | -216727 |
| 29 | -6973919 |
| 30 | -13297657 |
| 31 | -5673557 |
| 32 | 28545857 |
| 33 | 74112385 |
| 34 | 62587199 |
| 35 | -97162757 |
| 36 | -382087111 |
| 37 | -472685951 |