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 | -5 |
| 2 | 27 |
| 3 | -41 |
| 4 | 146 |
| 5 | -243 |
| 6 | 510 |
| 7 | -887 |
| 8 | 1755 |
| 9 | -2728 |
| 10 | 5052 |
| 11 | -7857 |
| 12 | 13157 |
| 13 | -20253 |
| 14 | 32805 |
| 15 | -48680 |
| 16 | 76568 |
| 17 | -112320 |
| 18 | 169814 |
| 19 | -246263 |
| 20 | 365013 |
| 21 | -519046 |
| 22 | 755632 |
| 23 | -1063368 |
| 24 | 1516404 |
| 25 | -2112551 |
| 26 | 2972160 |
| 27 | -4089098 |
| 28 | 5683166 |
| 29 | -7750782 |
| 30 | 10633276 |
| 31 | -14382932 |
| 32 | 19539387 |