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 | 0 |
| 2 | 1 |
| 3 | 6 |
| 4 | 10 |
| 5 | 100 |
| 6 | 126 |
| 7 | 1000 |
| 8 | 2376 |
| 9 | 4375 |
| 10 | 46251 |
| 11 | 156250 |
| 12 | 603126 |
| 13 | 3640626 |
| 14 | 7750000 |
| 15 | 19140625 |
| 16 | 151718751 |
| 17 | 835156251 |
| 18 | 1727734375 |
| 19 | 5960937501 |
| 20 | 32482421875 |
| 21 | 236621093751 |
| 22 | 340029296875 |
| 23 | 8413134765625 |
| 24 | 60784912109376 |
| 25 | 68961425781250 |
| 26 | 709516601562501 |
| 27 | 1236678466796875 |