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 | 10 |
| 2 | 150 |
| 3 | 125 |
| 4 | 3750 |
| 5 | 3125 |
| 6 | 656250 |
| 7 | 78125 |
| 8 | 2343750 |
| 9 | 1953125 |
| 10 | 644531250 |
| 11 | 48828125 |
| 12 | 133300781250 |
| 13 | 1220703125 |
| 14 | 36621093750 |
| 15 | 30517578125 |
| 16 | 15563964843750 |
| 17 | 762939453125 |
| 18 | 3044128417968750 |
| 19 | 19073486328125 |
| 20 | 6294250488281250 |