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 | 1 |
| 2 | 11 |
| 3 | 91 |
| 4 | 1219 |
| 5 | 15751 |
| 6 | 299291 |
| 7 | 5766517 |
| 8 | 136667939 |
| 9 | 3490056406 |
| 10 | 100539251801 |
| 11 | 3138428729437 |
| 12 | 107169878769043 |
| 13 | 3937376390899589 |
| 14 | 155639310270607349 |
| 15 | 6568429274592664981 |
| 16 | 295186202455912472867 |
| 17 | 14063084452068891794119 |
| 18 | 708261127356256620907496 |