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 | 2 |
| 1 | 1 |
| 2 | -3 |
| 3 | -5 |
| 4 | 1 |
| 5 | 11 |
| 6 | 9 |
| 7 | -13 |
| 8 | -31 |
| 9 | -5 |
| 10 | 57 |
| 11 | 67 |
| 12 | -47 |
| 13 | -181 |
| 14 | -87 |
| 15 | 275 |
| 16 | 449 |
| 17 | -101 |
| 18 | -999 |
| 19 | -797 |
| 20 | 1201 |
| 21 | 2795 |
| 22 | 393 |
| 23 | -5197 |
| 24 | -5983 |
| 25 | 4411 |
| 26 | 16377 |
| 27 | 7555 |
| 28 | -25199 |
| 29 | -40309 |
| 30 | 10089 |
| 31 | 90707 |
| 32 | 70529 |
| 33 | -110885 |
| 34 | -251943 |
| 35 | -30173 |
| 36 | 473713 |
| 37 | 534059 |
| 38 | -413367 |
| 39 | -1481485 |