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 | 0 |
| 2 | 7 |
| 3 | 181 |
| 4 | 3292 |
| 5 | 471040370 |
| 6 | 67306057205 |
| 7 | 9087508077407 |
| 8 | 1178111077100976 |
| 9 | 148114138013127912 |
| 10 | 18178417168316158215 |
| 11 | 2188212087201986191885 |
| 12 | 259225249124239023228922 |
| 13 | 30299629289528279427269326 |