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 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 2 |
| 7 | 4 |
| 8 | 8 |
| 9 | 15 |
| 10 | 30 |
| 11 | 60 |
| 12 | 122 |
| 13 | 249 |
| 14 | 513 |
| 15 | 1061 |
| 16 | 2210 |
| 17 | 4620 |
| 18 | 9708 |
| 19 | 20472 |
| 20 | 43337 |
| 21 | 92023 |
| 22 | 196018 |
| 23 | 418653 |
| 24 | 896485 |
| 25 | 1924154 |
| 26 | 4139014 |
| 27 | 8921349 |
| 28 | 19266067 |
| 29 | 41679483 |
| 30 | 90318082 |
| 31 | 196020800 |
| 32 | 426055601 |
| 33 | 927317334 |
| 34 | 2020949226 |
| 35 | 4409764169 |