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 | 1 |
| 3 | 1 |
| 4 | 0 |
| 5 | 1 |
| 6 | 1 |
| 7 | 2 |
| 8 | -2 |
| 9 | 1 |
| 10 | 1 |
| 11 | -4 |
| 12 | 9 |
| 13 | -5 |
| 14 | 1 |
| 15 | 1 |
| 16 | 20 |
| 17 | -41 |
| 18 | 30 |
| 19 | -9 |
| 20 | 1 |
| 21 | 1 |
| 22 | -100 |
| 23 | 233 |
| 24 | -195 |
| 25 | 76 |
| 26 | -14 |
| 27 | 1 |
| 28 | 1 |
| 29 | 620 |
| 30 | -1531 |
| 31 | 1429 |
| 32 | -659 |
| 33 | 161 |
| 34 | -20 |
| 35 | 1 |
| 36 | 1 |
| 37 | -4420 |
| 38 | 11537 |
| 39 | -11703 |
| 40 | 6110 |
| 41 | -1799 |
| 42 | 302 |
| 43 | -27 |
| 44 | 1 |
| 45 | 1 |
| 46 | 35900 |
| 47 | -98047 |
| 48 | 106421 |
| 49 | -61174 |
| 50 | 20650 |
| 51 | -4234 |
| 52 | 519 |
| 53 | -35 |
| 54 | 1 |