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 | 1 |
| 2 | 10 |
| 3 | 181 |
| 4 | 4078 |
| 5 | 102826 |
| 6 | 2777212 |
| 7 | 78571837 |
| 8 | 2298558934 |
| 9 | 68964092542 |
| 10 | 2110472708140 |
| 11 | 65620725560578 |
| 12 | 2067160250751436 |
| 13 | 65833929303952564 |
| 14 | 2116166898185821792 |
| 15 | 68565914052628406221 |
| 16 | 2237022199842087256678 |