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 | 2 |
| 2 | 14 |
| 3 | 128 |
| 4 | 1106 |
| 5 | 9032 |
| 6 | 70994 |
| 7 | 543608 |
| 8 | 4085186 |
| 9 | 30275912 |
| 10 | 222009074 |
| 11 | 1614529688 |
| 12 | 11664504866 |
| 13 | 83828316392 |
| 14 | 599858908754 |
| 15 | 4277376525368 |
| 16 | 30411820662146 |
| 17 | 215703854542472 |
| 18 | 1526853641242034 |
| 19 | 10789535445362648 |