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 | 1 |
| 2 | 8 |
| 3 | 160 |
| 4 | 5888 |
| 5 | 345856 |
| 6 | 29677568 |
| 7 | 3502489600 |
| 8 | 544181977088 |
| 9 | 107675615297536 |
| 10 | 26435436140822528 |
| 11 | 7885689342279024640 |
| 12 | 2809177794704769548288 |
| 13 | 1177952320402008693538816 |
| 14 | 574318105367992485583781888 |
| 15 | 322156963576521588458420961280 |
| 16 | 206009256195720974104252003647488 |