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 | 16 |
| 2 | 21 |
| 3 | 31 |
| 4 | 73 |
| 5 | 140 |
| 6 | 296 |
| 7 | 603 |
| 8 | 1288 |
| 9 | 2584 |
| 10 | 5456 |
| 11 | 11189 |
| 12 | 23561 |
| 13 | 48423 |
| 14 | 101409 |
| 15 | 209594 |
| 16 | 438175 |
| 17 | 906900 |
| 18 | 1891425 |
| 19 | 3921725 |
| 20 | 8172996 |
| 21 | 16960434 |
| 22 | 35311533 |
| 23 | 73325262 |
| 24 | 152605472 |
| 25 | 317023164 |
| 26 | 659531459 |
| 27 | 1370465497 |
| 28 | 2850564339 |
| 29 | 5924450361 |