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 | 3 |
| 2 | 31 |
| 3 | 476 |
| 4 | 7927 |
| 5 | 132119 |
| 6 | 2160036 |
| 7 | 34534687 |
| 8 | 540957770 |
| 9 | 8329684774 |
| 10 | 126518474741 |
| 11 | 1901584578700 |
| 12 | 28359907789963 |
| 13 | 420651674953990 |
| 14 | 6217185029060841 |
| 15 | 91703594406693983 |