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 | 130 |
| 2 | 4580 |
| 3 | 108625 |
| 4 | 2411246 |
| 5 | 54177872 |
| 6 | 1229044416 |
| 7 | 27957232796 |
| 8 | 636184842092 |
| 9 | 14476260508500 |
| 10 | 329391607167600 |
| 11 | 7494853316529036 |
| 12 | 170534677669656388 |
| 13 | 3880272541450452972 |
| 14 | 88290059453259690888 |
| 15 | 2008914306032132754800 |