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 | 11 |
| 2 | 142 |
| 3 | 1725 |
| 4 | 20732 |
| 5 | 248827 |
| 6 | 2985978 |
| 7 | 35831801 |
| 8 | 429981688 |
| 9 | 5159780343 |
| 10 | 61917364214 |
| 11 | 743008370677 |
| 12 | 8916100448244 |
| 13 | 106993205379059 |
| 14 | 1283918464548850 |
| 15 | 15407021574586353 |
| 16 | 184884258895036400 |
| 17 | 2218611106740436975 |
| 18 | 26623333280885243886 |
| 19 | 319479999370622926829 |