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 | 13 |
| 2 | 42 |
| 3 | 1079 |
| 4 | 1722 |
| 5 | 21853 |
| 6 | 68922 |
| 7 | 3458143 |
| 8 | 2696442 |
| 9 | 33470203 |
| 10 | 103382202 |
| 11 | 2543904389 |
| 12 | 3897783162 |
| 13 | 47622059953 |
| 14 | 145048634682 |
| 15 | 14103257698751 |
| 16 | 5345548005882 |
| 17 | 64723086609103 |
| 18 | 195627183442362 |
| 19 | 4724479536886499 |
| 20 | 7123774068628602 |
| 21 | 85858009003835653 |
| 22 | 258510157720861242 |