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 | 128 |
| 2 | 16384 |
| 3 | 371641 |
| 4 | 4075336 |
| 5 | 69943253 |
| 6 | 2239578131 |
| 7 | 61652076124 |
| 8 | 1256763617551 |
| 9 | 24523253340435 |
| 10 | 553063756559791 |
| 11 | 13299838117765230 |
| 12 | 302455226663091586 |
| 13 | 6562256770141965765 |
| 14 | 144156209612197100001 |
| 15 | 3257064388881887530527 |