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) |
|---|---|
| 0 | 1 |
| 1 | 4 |
| 2 | 22 |
| 3 | 190 |
| 4 | 3250 |
| 5 | 136758 |
| 6 | 17256831 |
| 7 | 7216495370 |
| 8 | 10271202313659 |
| 9 | 49856692830176512 |
| 10 | 826297617412284162618 |
| 11 | 46948445432190686211183650 |
| 12 | 9200267975562856184153936960940 |
| 13 | 6261904454889790650636380541051266410 |
| 14 | 14910331834338546882501064075429145637985605 |