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 | 1 |
| 2 | 4 |
| 3 | 82 |
| 4 | 7258 |
| 5 | 1491629 |
| 6 | 506855279 |
| 7 | 254118439668 |
| 8 | 176377605783906 |
| 9 | 162019808170348933 |
| 10 | 190375587419231088550 |
| 11 | 278587959330563466969926 |
| 12 | 496903413656110608290219603 |