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 | 1 |
| 2 | 5 |
| 3 | 9 |
| 4 | 9 |
| 5 | 47 |
| 6 | 54 |
| 7 | 171 |
| 8 | 867 |
| 9 | 3056 |
| 10 | 28687 |
| 11 | 133134 |
| 12 | 542005 |
| 13 | 563497 |
| 14 | 1046686 |
| 15 | 1955619 |
| 16 | 2057281 |
| 17 | 42760619 |
| 18 | 661780137 |
| 19 | 1109113993 |
| 20 | 6460565976 |
| 21 | 8523453296 |
| 22 | 34406061218 |
| 23 | 64402180149 |
| 24 | 1607033374515 |
| 25 | 10943963720662 |
| 26 | 124655149151970 |