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 | 4 |
| 3 | 64 |
| 4 | 16384 |
| 5 | 1073741824 |
| 6 | 4611686018427387904 |
| 7 | 85070591730234615865843651857942052864 |
| 8 | 28948022309329048855892746252171976963317496166410141009864396001978282409984 |