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 | 5 |
| 1 | 2875 |
| 2 | 4876875 |
| 3 | 8564575000 |
| 4 | 15517926796875 |
| 5 | 28663236110956000 |
| 6 | 53621944306062201000 |
| 7 | 101216230345800061125625 |
| 8 | 192323666400003538944396875 |
| 9 | 367299732093982242625847031250 |