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) |
|---|---|
| 4 | 1 |
| 5 | 46 |
| 6 | 1442 |
| 7 | 41070 |
| 8 | 1166083 |
| 9 | 34268902 |
| 10 | 1059688652 |
| 11 | 34723442062 |
| 12 | 1208687001381 |
| 13 | 44701813604150 |
| 14 | 1754724115372438 |
| 15 | 72987949807322222 |
| 16 | 3210789166789472775 |
| 17 | 149073947870611952326 |
| 18 | 7289995971215959818304 |
| 19 | 374726414201304528649678 |
| 20 | 20207920615298454956444905 |