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 | 12801 |
| 2 | 348161 |
| 3 | 3225601 |
| 4 | 104988673 |
| 5 | 4294967297 |
| 6 | 7816642561 |
| 7 | 43796171521 |
| 8 | 49413980161 |
| 9 | 54745942917121 |
| 10 | 51125767490519041 |
| 11 | 18314818035992494081 |
| 12 | 18446744073709551617 |