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 | 38 |
| 3 | 456 |
| 4 | 3210 |
| 5 | 16290 |
| 6 | 65922 |
| 7 | 225576 |
| 8 | 677742 |
| 9 | 1834755 |
| 10 | 4559620 |
| 11 | 10547888 |
| 12 | 22958364 |
| 13 | 47415108 |
| 14 | 93547260 |
| 15 | 177288240 |
| 16 | 324223524 |
| 17 | 574358277 |
| 18 | 988774554 |
| 19 | 1658764600 |
| 20 | 2718164150 |
| 21 | 4359769830 |
| 22 | 6856910190 |
| 23 | 10591453080 |
| 24 | 16089775650 |
| 25 | 24068499975 |
| 26 | 35492110056 |