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 | -1 |
| 2 | 2 |
| 3 | 1 |
| 4 | 0 |
| 5 | 8 |
| 6 | -7 |
| 7 | 22 |
| 8 | -6 |
| 9 | 13 |
| 10 | 29 |
| 11 | -11 |
| 12 | 82 |
| 13 | -36 |
| 14 | 114 |
| 15 | 13 |
| 16 | 103 |
| 17 | 88 |
| 18 | 88 |
| 19 | 275 |
| 20 | -20 |
| 21 | 549 |
| 22 | -200 |
| 23 | 1007 |
| 24 | -144 |
| 25 | 811 |
| 26 | 730 |
| 27 | 188 |
| 28 | 2093 |
| 29 | -777 |
| 30 | 3538 |
| 31 | -643 |
| 32 | 4083 |
| 33 | -537 |
| 34 | 4562 |
| 35 | 2478 |
| 36 | 1973 |
| 37 | 8062 |
| 38 | -3508 |
| 39 | 17362 |
| 40 | -8164 |
| 41 | 20281 |
| 42 | -2227 |
| 43 | 17483 |
| 44 | 8605 |
| 45 | 2946 |
| 46 | 30190 |
| 47 | -6085 |
| 48 | 53176 |
| 49 | -28913 |
| 50 | 78516 |