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 | 1 |
| 1 | 14 |
| 2 | 16383 |
| 3 | 2391484 |
| 4 | 89478485 |
| 5 | 1525878906 |
| 6 | 15672832819 |
| 7 | 113037178808 |
| 8 | 628292358729 |
| 9 | 2859599056870 |
| 10 | 11111111111111 |
| 11 | 37974983358324 |
| 12 | 116719860413533 |
| 13 | 328114698808274 |
| 14 | 854769755812155 |
| 15 | 2085209001813616 |
| 16 | 4803839602528529 |
| 17 | 10523614159962558 |
| 18 | 22047845151887119 |