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 | 35 |
| 2 | 629 |
| 3 | 7735 |
| 4 | 73184 |
| 5 | 567952 |
| 6 | 3763935 |
| 7 | 21898413 |
| 8 | 114117990 |
| 9 | 540864298 |
| 10 | 2359388214 |
| 11 | 9564192010 |
| 12 | 36311331322 |
| 13 | 129962338310 |
| 14 | 440928822623 |
| 15 | 1424753834021 |
| 16 | 4402462293690 |
| 17 | 13054834025406 |
| 18 | 37266085146835 |