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 | 5 |
| 3 | 49 |
| 4 | 721 |
| 5 | 14177 |
| 6 | 349141 |
| 7 | 10334689 |
| 8 | 357361985 |
| 9 | 14137664833 |
| 10 | 629779342213 |
| 11 | 31195027543505 |
| 12 | 1700812505769169 |
| 13 | 101218448336028193 |
| 14 | 6528869281965115541 |
| 15 | 453720852957751220353 |
| 16 | 33796334125623555379969 |
| 17 | 2686138908337714715560577 |
| 18 | 226908450494953996837748869 |