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) |
|---|---|
| 2 | 1 |
| 3 | 65 |
| 4 | 8281 |
| 5 | 1832833 |
| 6 | 648383681 |
| 7 | 344889060481 |
| 8 | 263241070687225 |
| 9 | 277821953546314241 |
| 10 | 393388714018670749633 |
| 11 | 728818437848717556976321 |
| 12 | 1729501321168395811504313561 |
| 13 | 5161574686582090379099550582145 |
| 14 | 19067391184605659825359397658612481 |
| 15 | 85976151321068604971683536102183592193 |