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 | 3 |
| 2 | 35 |
| 3 | 1395 |
| 4 | 200787 |
| 5 | 109221651 |
| 6 | 230674393235 |
| 7 | 1919209135381395 |
| 8 | 63379954960524853651 |
| 9 | 8339787869494479328087443 |
| 10 | 4380990637147598617372537398675 |
| 11 | 9196575543360038413217351554014467475 |
| 12 | 77184136346814161837268404381760884963259795 |