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) |
|---|---|
| 1 | 1 |
| 2 | -4 |
| 3 | 8 |
| 4 | -16 |
| 5 | 30 |
| 6 | -48 |
| 7 | 80 |
| 8 | -128 |
| 9 | 197 |
| 10 | -312 |
| 11 | 472 |
| 12 | -704 |
| 13 | 1046 |
| 14 | -1504 |
| 15 | 2160 |
| 16 | -3072 |
| 17 | 4306 |
| 18 | -6036 |
| 19 | 8360 |
| 20 | -11488 |
| 21 | 15712 |
| 22 | -21264 |
| 23 | 28656 |
| 24 | -38400 |
| 25 | 51127 |
| 26 | -67864 |
| 27 | 89552 |
| 28 | -117632 |
| 29 | 153926 |
| 30 | -200352 |
| 31 | 259904 |
| 32 | -335872 |
| 33 | 432336 |
| 34 | -554952 |
| 35 | 709728 |
| 36 | -904784 |
| 37 | 1150142 |
| 38 | -1457136 |