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 | 16 |
| 3 | 128 |
| 4 | 8192 |
| 5 | 16384 |
| 6 | 262144 |
| 7 | 16777216 |
| 8 | 134217728 |
| 9 | 2147483648 |
| 10 | 17179869184 |
| 11 | 137438953472 |
| 12 | 562949953421312 |
| 13 | 2251799813685248 |
| 14 | 147573952589676412928 |
| 15 | 4722366482869645213696 |
| 16 | 75557863725914323419136 |
| 17 | 151115727451828646838272 |
| 18 | 2417851639229258349412352 |
| 19 | 77371252455336267181195264 |
| 20 | 680564733841876926926749214863536422912 |