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 | 9 |
| 2 | 54 |
| 3 | 218 |
| 4 | 698 |
| 5 | 1915 |
| 6 | 4690 |
| 7 | 10511 |
| 8 | 21919 |
| 9 | 43045 |
| 10 | 80334 |
| 11 | 143496 |
| 12 | 246728 |
| 13 | 410255 |
| 14 | 662242 |
| 15 | 1041133 |
| 16 | 1598477 |
| 17 | 2402305 |
| 18 | 3541126 |
| 19 | 5128614 |
| 20 | 7309062 |
| 21 | 10263683 |
| 22 | 14217842 |
| 23 | 19449307 |
| 24 | 26297611 |
| 25 | 35174621 |
| 26 | 46576414 |
| 27 | 61096564 |
| 28 | 79440948 |