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 | 305 |
| 2 | 409 |
| 3 | 641 |
| 4 | 1189 |
| 5 | 2045 |
| 6 | 3541 |
| 7 | 6829 |
| 8 | 11861 |
| 9 | 20605 |
| 10 | 39785 |
| 11 | 69121 |
| 12 | 120089 |
| 13 | 231881 |
| 14 | 402865 |
| 15 | 699929 |
| 16 | 1351501 |
| 17 | 2348069 |
| 18 | 4079485 |
| 19 | 7877125 |
| 20 | 13685549 |
| 21 | 23776981 |
| 22 | 45911249 |
| 23 | 79765225 |
| 24 | 138582401 |
| 25 | 267590369 |
| 26 | 464905801 |
| 27 | 807717425 |
| 28 | 1559630965 |