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 | 1 |
| 2 | 7 |
| 3 | 77 |
| 4 | 1155 |
| 5 | 21945 |
| 6 | 504735 |
| 7 | 13627845 |
| 8 | 422463195 |
| 9 | 14786211825 |
| 10 | 576662261175 |
| 11 | 24796477230525 |
| 12 | 1165434429834675 |
| 13 | 59437155921568425 |
| 14 | 3269043575686263375 |
| 15 | 192873570965489539125 |
| 16 | 12151034970825840964875 |
| 17 | 814119343045331344646625 |
| 18 | 57802473356218525469910375 |