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 | 27 |
| 3 | 134656 |
| 4 | 56615355 |
| 5 | 6138243072 |
| 6 | 282390755580 |
| 7 | 7190065585152 |
| 8 | 118730950577595 |
| 9 | 1408531971420160 |
| 10 | 12872835457479666 |
| 11 | 95262154452748800 |
| 12 | 592216338844654972 |
| 13 | 3180419513581234176 |
| 14 | 15078667591360144440 |
| 15 | 64208193499209765888 |
| 16 | 248996850497620053435 |