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 | 10 |
| 2 | 79 |
| 3 | 622 |
| 4 | 4897 |
| 5 | 38554 |
| 6 | 303535 |
| 7 | 2389726 |
| 8 | 18814273 |
| 9 | 148124458 |
| 10 | 1166181391 |
| 11 | 9181326670 |
| 12 | 72284431969 |
| 13 | 569094129082 |
| 14 | 4480468600687 |
| 15 | 35274654676414 |
| 16 | 277716768810625 |
| 17 | 2186459495808586 |
| 18 | 17213959197658063 |