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 | -3 |
| 2 | -2 |
| 3 | 7 |
| 4 | 5 |
| 5 | 9 |
| 6 | -13 |
| 7 | -27 |
| 8 | -36 |
| 9 | -36 |
| 10 | 67 |
| 11 | 117 |
| 12 | 184 |
| 13 | 171 |
| 14 | -38 |
| 15 | -356 |
| 16 | -731 |
| 17 | -883 |
| 18 | -733 |
| 19 | -90 |
| 20 | 1194 |
| 21 | 2828 |
| 22 | 4202 |
| 23 | 5008 |
| 24 | 3993 |
| 25 | 201 |
| 26 | -6649 |
| 27 | -15984 |
| 28 | -26148 |
| 29 | -32864 |
| 30 | -30316 |
| 31 | -13192 |
| 32 | 22406 |
| 33 | 75700 |
| 34 | 139948 |
| 35 | 196508 |
| 36 | 222252 |
| 37 | 184914 |
| 38 | 53773 |
| 39 | -192233 |
| 40 | -547296 |
| 41 | -968438 |
| 42 | -1361207 |