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 | 2 |
| 2 | 4 |
| 3 | 9 |
| 4 | 18 |
| 5 | 43 |
| 6 | 88 |
| 7 | 183 |
| 8 | 370 |
| 9 | 761 |
| 10 | 1536 |
| 11 | 3081 |
| 12 | 6202 |
| 13 | 12427 |
| 14 | 24908 |
| 15 | 49875 |
| 16 | 99834 |
| 17 | 199769 |
| 18 | 399572 |
| 19 | 799289 |
| 20 | 1598726 |
| 21 | 3197557 |
| 22 | 6395400 |
| 23 | 12791045 |
| 24 | 25582310 |
| 25 | 51164767 |
| 26 | 102329800 |
| 27 | 204659929 |
| 28 | 409320270 |
| 29 | 818640731 |
| 30 | 1637281876 |
| 31 | 3274564199 |
| 32 | 6549128694 |
| 33 | 13098257783 |
| 34 | 26196515972 |