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 | 2 |
| 1 | 17 |
| 2 | 134 |
| 3 | 1055 |
| 4 | 8306 |
| 5 | 65393 |
| 6 | 514838 |
| 7 | 4053311 |
| 8 | 31911650 |
| 9 | 251239889 |
| 10 | 1978007462 |
| 11 | 15572819807 |
| 12 | 122604550994 |
| 13 | 965263588145 |
| 14 | 7599504154166 |
| 15 | 59830769645183 |
| 16 | 471046653007298 |
| 17 | 3708542454413201 |
| 18 | 29197292982298310 |