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 | 0 |
| 1 | 1 |
| 2 | 2 |
| 3 | 0 |
| 4 | -3 |
| 5 | -1 |
| 6 | 5 |
| 7 | 4 |
| 8 | -7 |
| 9 | -10 |
| 10 | 8 |
| 11 | 21 |
| 12 | -5 |
| 13 | -39 |
| 14 | -8 |
| 15 | 65 |
| 16 | 42 |
| 17 | -96 |
| 18 | -115 |
| 19 | 119 |
| 20 | 253 |
| 21 | -100 |
| 22 | -487 |
| 23 | -34 |
| 24 | 840 |
| 25 | 421 |
| 26 | -1293 |
| 27 | -1295 |
| 28 | 1712 |
| 29 | 3009 |
| 30 | -1710 |
| 31 | -6016 |
| 32 | 413 |
| 33 | 10735 |
| 34 | 3893 |
| 35 | -17164 |
| 36 | -14215 |
| 37 | 24006 |
| 38 | 35272 |
| 39 | -26955 |
| 40 | -73493 |
| 41 | 15689 |
| 42 | 135720 |
| 43 | 30849 |
| 44 | -224902 |