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) |
|---|---|
| 2 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 1 |
| 6 | 5 |
| 7 | -2 |
| 8 | 1 |
| 9 | 10 |
| 10 | 15 |
| 11 | -10 |
| 12 | 1 |
| 13 | 14 |
| 14 | 31 |
| 15 | -46 |
| 16 | 16 |
| 17 | 1 |
| 18 | 21 |
| 19 | 105 |
| 20 | 35 |
| 21 | -210 |
| 22 | 112 |
| 23 | 1 |
| 24 | 27 |
| 25 | 183 |
| 26 | 97 |
| 27 | -832 |
| 28 | 860 |
| 29 | -272 |
| 30 | 1 |
| 31 | 36 |
| 32 | 378 |
| 33 | 1008 |
| 34 | -1575 |
| 35 | -2436 |
| 36 | 5292 |
| 37 | -2448 |
| 38 | 1 |
| 39 | 44 |
| 40 | 586 |
| 41 | 2144 |
| 42 | -3719 |
| 43 | -10876 |
| 44 | 31036 |
| 45 | -26896 |
| 46 | 7936 |
| 47 | 1 |
| 48 | 55 |
| 49 | 990 |
| 50 | 6270 |
| 51 | 3465 |
| 52 | -51513 |
| 53 | 27720 |
| 54 | 135300 |
| 55 | -208560 |