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 | 15000 |
| 5 | 375000 |
| 6 | 11250000 |
| 7 | 393750000 |
| 8 | 15750000000 |
| 9 | 708750000000 |
| 10 | 35437500000000 |
| 11 | 1949062500000000 |
| 12 | 116943750000000000 |
| 13 | 7601343750000000000 |
| 14 | 532094062500000000000 |
| 15 | 39907054687500000000000 |