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 | 0 |
| 1 | 16384 |
| 2 | 2097152 |
| 3 | 35831808 |
| 4 | 268435456 |
| 5 | 1280000000 |
| 6 | 4586471424 |
| 7 | 13492928512 |
| 8 | 34359738368 |
| 9 | 78364164096 |
| 10 | 163840000000 |
| 11 | 319277809664 |
| 12 | 587068342272 |
| 13 | 1028071702528 |
| 14 | 1727094849536 |
| 15 | 2799360000000 |