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 | 3 |
| 1 | 4 |
| 2 | 4 |
| 3 | -2 |
| 4 | -24 |
| 5 | -76 |
| 6 | -164 |
| 7 | -248 |
| 8 | -160 |
| 9 | 520 |
| 10 | 2544 |
| 11 | 6736 |
| 12 | 12720 |
| 13 | 15552 |
| 14 | -640 |
| 15 | -70432 |
| 16 | -246784 |
| 17 | -565824 |
| 18 | -923456 |
| 19 | -792448 |
| 20 | 1239296 |
| 21 | 7864960 |
| 22 | 22439168 |
| 23 | 45045504 |
| 24 | 61276928 |
| 25 | 19713024 |
| 26 | -198718464 |
| 27 | -790598144 |
| 28 | -1930655744 |
| 29 | -3376471040 |
| 30 | -3503145984 |
| 31 | 2384930816 |
| 32 | 23805657088 |