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 | 16384 |
| 1 | 105413504 |
| 2 | 4586471424 |
| 3 | 52523350144 |
| 4 | 319277809664 |
| 5 | 1338925209984 |
| 6 | 4398046511104 |
| 7 | 12151280273024 |
| 8 | 29509034655744 |
| 9 | 64847759419264 |
| 10 | 131593177923584 |
| 11 | 250226879128704 |
| 12 | 450766669594624 |
| 13 | 775771085481344 |