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 | 6 |
| 2 | 19 |
| 3 | 44 |
| 4 | 333 |
| 5 | 710 |
| 6 | 103993 |
| 7 | 312689 |
| 8 | 2292816 |
| 9 | 4272943 |
| 10 | 10838702 |
| 11 | 80143857 |
| 12 | 411557987 |
| 13 | 2549491779 |
| 14 | 14885392687 |
| 15 | 42106686282 |
| 16 | 1783366216531 |
| 17 | 8958937768937 |
| 18 | 288469374822515 |
| 19 | 856449186698608 |
| 20 | 5706674932067741 |
| 21 | 12269799050834090 |
| 22 | 30246273033735921 |
| 23 | 133254891185777774 |