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 | -14 |
| 2 | 63 |
| 3 | -14 |
| 4 | -651 |
| 5 | 1162 |
| 6 | 2198 |
| 7 | -3432 |
| 8 | -12320 |
| 9 | -7098 |
| 10 | 87479 |
| 11 | 45024 |
| 12 | -185038 |
| 13 | -348250 |
| 14 | -435473 |
| 15 | 1642942 |
| 16 | 2806839 |
| 17 | 1366078 |
| 18 | -7970459 |
| 19 | -25275068 |
| 20 | -631813 |
| 21 | 38994650 |
| 22 | 112439376 |
| 23 | 112528514 |
| 24 | -136016069 |
| 25 | -535046498 |