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 | 5 |
| 2 | 34 |
| 3 | 201 |
| 4 | 1179 |
| 5 | 6909 |
| 6 | 40488 |
| 7 | 237256 |
| 8 | 1390293 |
| 9 | 8146945 |
| 10 | 47740079 |
| 11 | 279750872 |
| 12 | 1639304997 |
| 13 | 9606121523 |
| 14 | 56290666385 |
| 15 | 329856239532 |
| 16 | 1932916160781 |
| 17 | 11326646086501 |
| 18 | 66372724369487 |
| 19 | 388935833836819 |
| 20 | 2279115167854766 |