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 | 2 |
| 1 | 56 |
| 2 | 992 |
| 3 | 16256 |
| 4 | 261632 |
| 5 | 4192256 |
| 6 | 67100672 |
| 7 | 1073709056 |
| 8 | 17179738112 |
| 9 | 274877382656 |
| 10 | 628292059136 |
| 11 | 70368735789056 |
| 12 | 1125899873288192 |
| 13 | 18014398375264256 |
| 14 | 288230375614840832 |
| 15 | 4611686016279904256 |
| 16 | 73786976286248271872 |
| 17 | 1180591620683051565056 |