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) |
|---|---|
| 2 | 10 |
| 3 | 108 |
| 4 | 1049 |
| 5 | 9349 |
| 6 | 80626 |
| 7 | 692194 |
| 8 | 5948291 |
| 9 | 51139577 |
| 10 | 439673502 |
| 11 | 3779989098 |
| 12 | 32497334055 |
| 13 | 279386435639 |
| 14 | 2401945965628 |
| 15 | 20650054358200 |
| 16 | 177533025653767 |
| 17 | 1526290165248783 |
| 18 | 13121849649571820 |
| 19 | 112811405309454694 |
| 20 | 969864273118112913 |
| 21 | 8338134834111643373 |
| 22 | 71684765011673779732 |