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) |
|---|---|
| 28 | 1 |
| 29 | 29 |
| 30 | 435 |
| 31 | 4495 |
| 32 | 35960 |
| 33 | 237336 |
| 34 | 1344904 |
| 35 | 6724520 |
| 36 | 30260340 |
| 37 | 124403620 |
| 38 | 472733756 |
| 39 | 1676056044 |
| 40 | 5586853480 |
| 41 | 17620076360 |
| 42 | 52860229080 |
| 43 | 151532656696 |
| 44 | 416714805914 |
| 45 | 1103068603890 |
| 46 | 2818953098830 |
| 47 | 6973199770790 |
| 48 | 16735679449896 |
| 49 | 39049918716424 |
| 50 | 88749815264600 |