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 | 0 |
| 2 | 1 |
| 3 | 2 |
| 4 | 4 |
| 5 | 6 |
| 6 | 13 |
| 7 | 22 |
| 8 | 46 |
| 9 | 80 |
| 10 | 166 |
| 11 | 296 |
| 12 | 610 |
| 13 | 1106 |
| 14 | 2269 |
| 15 | 4166 |
| 16 | 8518 |
| 17 | 15792 |
| 18 | 32206 |
| 19 | 60172 |
| 20 | 122464 |
| 21 | 230252 |
| 22 | 467842 |
| 23 | 884236 |
| 24 | 1794196 |
| 25 | 3406104 |
| 26 | 6903352 |
| 27 | 13154948 |
| 28 | 26635774 |
| 29 | 50922986 |
| 30 | 103020253 |
| 31 | 197519942 |
| 32 | 399300166 |
| 33 | 767502944 |
| 34 | 1550554582 |