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 | 3 |
| 3 | 4 |
| 4 | 10 |
| 5 | 11 |
| 6 | 30 |
| 7 | 31 |
| 8 | 82 |
| 9 | 83 |
| 10 | 226 |
| 11 | 227 |
| 12 | 615 |
| 13 | 616 |
| 14 | 1673 |
| 15 | 1674 |
| 16 | 4549 |
| 17 | 4550 |
| 18 | 12366 |
| 19 | 12367 |
| 20 | 33616 |
| 21 | 33617 |