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 | 355 |
| 3 | 9829 |
| 4 | 230845 |
| 5 | 6415089 |
| 6 | 177320895 |
| 7 | 4832005625 |
| 8 | 131942833529 |
| 9 | 3606055280657 |
| 10 | 98529266203659 |
| 11 | 2692051448713949 |
| 12 | 73554857285973785 |
| 13 | 2009736562063323785 |
| 14 | 54911874439751493035 |
| 15 | 1500353181134236949205 |