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 | 2 |
| 3 | 2 |
| 4 | 4 |
| 5 | 6 |
| 6 | 12 |
| 7 | 22 |
| 8 | 46 |
| 9 | 93 |
| 10 | 205 |
| 11 | 451 |
| 12 | 1039 |
| 13 | 2422 |
| 14 | 5803 |
| 15 | 14075 |
| 16 | 34757 |
| 17 | 86761 |
| 18 | 219235 |
| 19 | 558984 |
| 20 | 1438033 |
| 21 | 3726535 |
| 22 | 9723913 |
| 23 | 25525112 |
| 24 | 67375200 |
| 25 | 178723358 |
| 26 | 476264352 |
| 27 | 1274448596 |
| 28 | 3423494617 |
| 29 | 9229075121 |
| 30 | 24961969420 |
| 31 | 67721961268 |
| 32 | 184255962564 |
| 33 | 502658875034 |
| 34 | 1374713691841 |
| 35 | 3768527610094 |
| 36 | 10353602341313 |