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) |
|---|---|
| 1 | 0 |
| 2 | 126 |
| 3 | 3932 |
| 4 | 123706 |
| 5 | 3584756 |
| 6 | 108110791 |
| 7 | 3229944132 |
| 8 | 98063836816 |
| 9 | 2979455186170 |
| 10 | 91160980841335 |
| 11 | 2796112154318134 |
| 12 | 86095874180805420 |
| 13 | 2657384402642912532 |
| 14 | 82232542990639333587 |
| 15 | 2549783287899756993727 |