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 | 12 |
| 7 | 22 |
| 8 | 41 |
| 9 | 74 |
| 10 | 137 |
| 11 | 252 |
| 12 | 464 |
| 13 | 852 |
| 14 | 1568 |
| 15 | 2884 |
| 16 | 5305 |
| 17 | 9756 |
| 18 | 17945 |
| 19 | 33006 |
| 20 | 60708 |
| 21 | 111658 |
| 22 | 205372 |
| 23 | 377738 |
| 24 | 694769 |
| 25 | 1277878 |
| 26 | 2350385 |
| 27 | 4323032 |
| 28 | 7951296 |
| 29 | 14624712 |
| 30 | 26899040 |
| 31 | 49475048 |
| 32 | 90998801 |
| 33 | 167372888 |
| 34 | 307846737 |
| 35 | 566218426 |
| 36 | 1041438052 |