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 | 11 |
| 2 | 143 |
| 3 | 1727 |
| 4 | 20735 |
| 5 | 248831 |
| 6 | 2985983 |
| 7 | 35831807 |
| 8 | 429981695 |
| 9 | 5159780351 |
| 10 | 61917364223 |
| 11 | 743008370687 |
| 12 | 8916100448255 |
| 13 | 106993205379071 |
| 14 | 1283918464548863 |
| 15 | 15407021574586367 |
| 16 | 184884258895036415 |