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 | -24 |
| 4 | 13 |
| 5 | -113 |
| 6 | 28 |
| 7 | -316 |
| 8 | 49 |
| 9 | -681 |
| 10 | 76 |
| 11 | -1256 |
| 12 | 109 |
| 13 | -2089 |
| 14 | 148 |
| 15 | -3228 |
| 16 | 193 |
| 17 | -4721 |
| 18 | 244 |
| 19 | -6616 |
| 20 | 301 |
| 21 | -8961 |
| 22 | 364 |
| 23 | -11804 |
| 24 | 433 |
| 25 | -15193 |
| 26 | 508 |
| 27 | -19176 |
| 28 | 589 |
| 29 | -23801 |
| 30 | 676 |
| 31 | -29116 |
| 32 | 769 |
| 33 | -35169 |
| 34 | 868 |
| 35 | -42008 |
| 36 | 973 |
| 37 | -49681 |
| 38 | 1084 |
| 39 | -58236 |
| 40 | 1201 |
| 41 | -67721 |
| 42 | 1324 |
| 43 | -78184 |
| 44 | 1453 |
| 45 | -89673 |
| 46 | 1588 |
| 47 | -102236 |
| 48 | 1729 |
| 49 | -115921 |
| 50 | 1876 |