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 | 9 |
| 2 | 72 |
| 3 | 626 |
| 4 | 6084 |
| 5 | 64974 |
| 6 | 744193 |
| 7 | 8965323 |
| 8 | 112088583 |
| 9 | 1441465015 |
| 10 | 18952951005 |
| 11 | 253712542005 |
| 12 | 3447133563343 |
| 13 | 47425573790397 |
| 14 | 659506609478472 |
| 15 | 9256644358552742 |
| 16 | 130981854694547790 |
| 17 | 1866712391002772586 |