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 | 2 |
| 2 | 5 |
| 3 | 16 |
| 4 | 57 |
| 5 | 212 |
| 6 | 817 |
| 7 | 3232 |
| 8 | 13018 |
| 9 | 53176 |
| 10 | 219680 |
| 11 | 915928 |
| 12 | 3848079 |
| 13 | 16271384 |
| 14 | 69183099 |
| 15 | 295561620 |
| 16 | 1267964967 |
| 17 | 5459626526 |