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 | 2 |
| 3 | 3 |
| 4 | 5 |
| 5 | 7 |
| 6 | 15 |
| 7 | 24 |
| 8 | 49 |
| 9 | 91 |
| 10 | 183 |
| 11 | 356 |
| 12 | 734 |
| 13 | 1465 |
| 14 | 3017 |
| 15 | 6153 |
| 16 | 12721 |
| 17 | 26230 |
| 18 | 54575 |
| 19 | 113480 |
| 20 | 237296 |
| 21 | 496612 |
| 22 | 1042785 |
| 23 | 2192207 |
| 24 | 4619736 |
| 25 | 9747966 |
| 26 | 20607348 |