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 | 0 |
| 1 | 1 |
| 2 | 7 |
| 3 | 133 |
| 4 | 1330 |
| 5 | 18430 |
| 6 | 210490 |
| 7 | 2673223 |
| 8 | 31940881 |
| 9 | 394918819 |
| 10 | 4788779380 |
| 11 | 58709030380 |
| 12 | 715296121540 |
| 13 | 8745656280829 |
| 14 | 106717441265323 |
| 15 | 1303667366328817 |
| 16 | 15915556720909510 |
| 17 | 194371775990116810 |