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 | 69 |
| 3 | 265 |
| 4 | 841 |
| 5 | 9344 |
| 6 | 54286 |
| 7 | 263489 |
| 8 | 1867837 |
| 9 | 11720327 |
| 10 | 67180741 |
| 11 | 427478196 |
| 12 | 2684604782 |
| 13 | 16293846922 |
| 14 | 101493385902 |
| 15 | 633831772689 |
| 16 | 3915691482795 |
| 17 | 24329648655368 |
| 18 | 151531436485578 |
| 19 | 940950081557125 |
| 20 | 5849298968131709 |