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 | 13 |
| 2 | 281 |
| 3 | 6728 |
| 4 | 167089 |
| 5 | 4213133 |
| 6 | 106912793 |
| 7 | 2720246633 |
| 8 | 69289288909 |
| 9 | 1765722581057 |
| 10 | 45005025662792 |
| 11 | 1147185247901449 |
| 12 | 29242880940226381 |
| 13 | 745439797095329713 |
| 14 | 19002353776441540177 |
| 15 | 484398978524471931341 |
| 16 | 12348080425980866090537 |
| 17 | 314771823879840325570888 |