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 | -1 |
| 3 | 17 |
| 4 | -16 |
| 5 | 49 |
| 6 | -17 |
| 7 | 97 |
| 8 | -112 |
| 9 | 225 |
| 10 | -49 |
| 11 | 241 |
| 12 | -272 |
| 13 | 337 |
| 14 | -97 |
| 15 | 833 |
| 16 | -640 |
| 17 | 577 |
| 18 | -225 |
| 19 | 721 |
| 20 | -784 |
| 21 | 1649 |
| 22 | -241 |
| 23 | 1057 |
| 24 | -1904 |
| 25 | 1825 |
| 26 | -337 |
| 27 | 2673 |
| 28 | -1552 |
| 29 | 1681 |
| 30 | -833 |
| 31 | 1921 |
| 32 | -3328 |
| 33 | 4097 |
| 34 | -577 |
| 35 | 4753 |
| 36 | -3600 |
| 37 | 2737 |
| 38 | -721 |
| 39 | 5729 |
| 40 | -5488 |
| 41 | 3361 |
| 42 | -1649 |
| 43 | 3697 |
| 44 | -3856 |
| 45 | 11025 |
| 46 | -1057 |
| 47 | 4417 |