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 | 5 |
| 2 | 50 |
| 3 | 625 |
| 4 | 8750 |
| 5 | 131250 |
| 6 | 2062500 |
| 7 | 33515625 |
| 8 | 558593750 |
| 9 | 9496093750 |
| 10 | 164023437500 |
| 11 | 2870410156250 |
| 12 | 50784179687500 |
| 13 | 906860351562500 |
| 14 | 16323486328125000 |
| 15 | 295863189697265625 |
| 16 | 5395152282714843750 |
| 17 | 98911125183105468750 |
| 18 | 1822047042846679687500 |