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 | 9 |
| 2 | 93 |
| 3 | 688 |
| 4 | 5263 |
| 5 | 47968 |
| 6 | 395011 |
| 7 | 3230902 |
| 8 | 27481626 |
| 9 | 229676841 |
| 10 | 1910165184 |
| 11 | 16025802938 |
| 12 | 134083375797 |
| 13 | 1119947127057 |
| 14 | 9371655819528 |
| 15 | 78394858172957 |
| 16 | 655469582914166 |
| 17 | 5482454528107606 |
| 18 | 45855352909036892 |
| 19 | 383489210777394048 |