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) |
|---|---|
| 0 | 1 |
| 1 | 1 |
| 2 | 1 |
| 3 | 5 |
| 4 | 9 |
| 5 | 17 |
| 6 | 45 |
| 7 | 81 |
| 8 | 181 |
| 9 | 397 |
| 10 | 965 |
| 11 | 1729 |
| 12 | 3673 |
| 13 | 7313 |
| 14 | 15401 |
| 15 | 34065 |
| 16 | 68617 |
| 17 | 135069 |
| 18 | 266701 |
| 19 | 556969 |
| 20 | 1061921 |
| 21 | 2434385 |
| 22 | 4436157 |
| 23 | 9120869 |
| 24 | 17811665 |
| 25 | 35651301 |
| 26 | 68949549 |
| 27 | 136796317 |
| 28 | 283612973 |
| 29 | 537616261 |
| 30 | 1039994921 |
| 31 | 2081261717 |
| 32 | 3980842425 |
| 33 | 7723253181 |
| 34 | 15027216049 |