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 | -10 |
| 3 | -10 |
| 4 | 45 |
| 5 | -10 |
| 6 | 100 |
| 7 | -10 |
| 8 | -120 |
| 9 | 45 |
| 10 | 100 |
| 11 | -10 |
| 12 | -450 |
| 13 | -10 |
| 14 | 100 |
| 15 | 100 |
| 16 | 210 |
| 17 | -10 |
| 18 | -450 |
| 19 | -10 |
| 20 | -450 |
| 21 | 100 |
| 22 | 100 |
| 23 | -10 |
| 24 | 1200 |
| 25 | 45 |
| 26 | 100 |
| 27 | -120 |
| 28 | -450 |
| 29 | -10 |
| 30 | -1000 |
| 31 | -10 |
| 32 | -252 |
| 33 | 100 |
| 34 | 100 |
| 35 | 100 |
| 36 | 2025 |
| 37 | -10 |
| 38 | 100 |
| 39 | 100 |
| 40 | 1200 |
| 41 | -10 |
| 42 | -1000 |
| 43 | -10 |
| 44 | -450 |
| 45 | -450 |
| 46 | 100 |
| 47 | -10 |
| 48 | -2100 |
| 49 | 45 |
| 50 | -450 |
| 51 | 100 |
| 52 | -450 |