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 | 9 |
| 3 | 184 |
| 4 | 30 |
| 5 | 8 |
| 6 | 105 |
| 7 | 1922263344 |
| 8 | 21 |
| 9 | 41520 |
| 10 | 495 |
| 11 | 40 |
| 12 | 858 |
| 13 | 3488424 |
| 14 | 65 |
| 15 | 30996 |
| 16 | 2040 |
| 17 | 96 |
| 18 | 2907 |
| 19 | 264925230120 |
| 20 | 133 |
| 21 | 2787400 |
| 22 | 5313 |
| 23 | 176 |
| 24 | 6900 |
| 25 | 237360 |
| 26 | 225 |
| 27 | 9742824 |
| 28 | 10962 |
| 29 | 280 |
| 30 | 13485 |
| 31 | 763713003420 |
| 32 | 341 |
| 33 | 26485184 |
| 34 | 19635 |
| 35 | 408 |
| 36 | 23310 |
| 37 | 107599353444576 |
| 38 | 481 |
| 39 | 60920080 |
| 40 | 31980 |