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 | 2 |
| 2 | 4 |
| 3 | 4 |
| 4 | 12 |
| 5 | 24 |
| 6 | 48 |
| 7 | 96 |
| 8 | 196 |
| 9 | 368 |
| 10 | 760 |
| 11 | 1524 |
| 12 | 3064 |
| 13 | 6068 |
| 14 | 12168 |
| 15 | 24360 |
| 16 | 48668 |
| 17 | 97160 |
| 18 | 194952 |
| 19 | 389416 |
| 20 | 778832 |
| 21 | 1557780 |
| 22 | 3116216 |
| 23 | 6229836 |
| 24 | 12462296 |
| 25 | 24923320 |
| 26 | 49849604 |
| 27 | 99694536 |
| 28 | 199394616 |
| 29 | 398783628 |
| 30 | 797556364 |
| 31 | 1595117676 |
| 32 | 3190297400 |
| 33 | 6380517544 |
| 34 | 12761088588 |
| 35 | 25522110948 |
| 36 | 51044281208 |
| 37 | 102088450460 |
| 38 | 204177067944 |
| 39 | 408353857832 |
| 40 | 816708255152 |