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) |
|---|---|
| 1 | 80080840 |
| 2 | 4448084040 |
| 3 | 804844884480 |
| 4 | 4448404804004804800840804848000 |
| 5 | 44804084840840840848040408400000 |