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 | 4 |
| 1 | 36 |
| 2 | 610 |
| 3 | 11988 |
| 4 | 248914 |
| 5 | 5314716 |
| 6 | 115151530 |
| 7 | 2513845188 |
| 8 | 55090232674 |
| 9 | 1209627165996 |
| 10 | 26585860217050 |
| 11 | 584603613083988 |
| 12 | 12858141059430034 |
| 13 | 282844580595234876 |
| 14 | 6222201023261420170 |
| 15 | 136884245263581500388 |
| 16 | 3011407446068928780994 |