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) |
|---|---|
| 4 | 5 |
| 5 | 12 |
| 6 | 38 |
| 7 | 141 |
| 8 | 592 |
| 9 | 2752 |
| 10 | 13960 |
| 11 | 76464 |
| 12 | 448603 |
| 13 | 2801054 |
| 14 | 18516832 |
| 15 | 129034659 |
| 16 | 944356507 |
| 17 | 7235605732 |
| 18 | 57879020756 |
| 19 | 482189616711 |
| 20 | 4174720731316 |
| 21 | 37489711726834 |
| 22 | 348592657600818 |
| 23 | 3350919079643612 |
| 24 | 33252861484374737 |
| 25 | 340209759518479300 |
| 26 | 3584240435109146792 |