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 | 4 |
| 3 | 9 |
| 4 | 41 |
| 5 | 109 |
| 6 | 1291 |
| 7 | 28604 |
| 8 | 78541 |
| 9 | 81619 |
| 10 | 782104 |
| 11 | 1054119 |
| 12 | 3341881 |
| 13 | 4345881 |
| 14 | 25823791 |
| 15 | 29439546 |
| 16 | 129105041 |
| 17 | 817851954 |
| 18 | 931064546 |
| 19 | 2486185454 |
| 20 | 2609955204 |
| 21 | 24862847104 |
| 22 | 786680914454 |