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) |
|---|---|
| 0 | 1 |
| 1 | 28 |
| 2 | 496 |
| 3 | 8128 |
| 4 | 130816 |
| 5 | 2096128 |
| 6 | 33550336 |
| 7 | 536854528 |
| 8 | 8589869056 |
| 9 | 137438691328 |
| 10 | 2199022206976 |
| 11 | 35184367894528 |
| 12 | 562949936644096 |
| 13 | 9007199187632128 |
| 14 | 144115187807420416 |
| 15 | 2305843008139952128 |