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 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 1 |
| 4 | -4 |
| 5 | -11 |
| 6 | -10 |
| 7 | 13 |
| 8 | 56 |
| 9 | 73 |
| 10 | -22 |
| 11 | -263 |
| 12 | -460 |
| 13 | -131 |
| 14 | 1118 |
| 15 | 2629 |
| 16 | 1904 |
| 17 | -4079 |
| 18 | -13870 |
| 19 | -15503 |
| 20 | 10604 |
| 21 | 67717 |
| 22 | 103622 |
| 23 | 4093 |
| 24 | -302680 |
| 25 | -617639 |
| 26 | -327238 |
| 27 | 1198441 |
| 28 | 3378596 |
| 29 | 3161869 |
| 30 | -3812050 |
| 31 | -17109707 |
| 32 | -22783264 |
| 33 | 5762593 |
| 34 | 79874978 |
| 35 | 142462177 |
| 36 | 45299420 |
| 37 | -336787691 |