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 | 7 |
| 2 | 32 |
| 3 | 296 |
| 4 | 5744 |
| 5 | 227080 |
| 6 | 18084720 |
| 7 | 2883751336 |
| 8 | 916819998880 |
| 9 | 579403471332808 |
| 10 | 726271886301488352 |
| 11 | 1802717127912019473096 |
| 12 | 8849500619057758939673040 |
| 13 | 85830556827312530479498758296 |
| 14 | 1643431935596454045971815328866560 |
| 15 | 62082178562357221739454020443666212184 |