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 | 256 |
| 2 | 65536 |
| 3 | 3863372 |
| 4 | 88682677 |
| 5 | 1271992512 |
| 6 | 13394424591 |
| 7 | 112751480926 |
| 8 | 798519332969 |
| 9 | 4918189868664 |
| 10 | 26945689043408 |
| 11 | 133456233695247 |
| 12 | 604775893442790 |
| 13 | 2531399109074463 |
| 14 | 9862376758221364 |
| 15 | 35997221510544568 |