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 | 750 |
| 4 | 12500 |
| 5 | 212500 |
| 6 | 3625000 |
| 7 | 61875000 |
| 8 | 1056250000 |
| 9 | 18031250000 |
| 10 | 307812500000 |
| 11 | 5254687500000 |
| 12 | 89703125000000 |
| 13 | 1531328125000000 |
| 14 | 26141406250000000 |
| 15 | 446261718750000000 |
| 16 | 7618164062500000000 |