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 | 2 |
| 1 | 6 |
| 2 | 10 |
| 3 | 21 |
| 4 | 41 |
| 5 | 80 |
| 6 | 162 |
| 7 | 324 |
| 8 | 646 |
| 9 | 1294 |
| 10 | 2586 |
| 11 | 5173 |
| 12 | 10345 |
| 13 | 20691 |
| 14 | 41381 |
| 15 | 82760 |
| 16 | 165522 |
| 17 | 331044 |
| 18 | 662089 |
| 19 | 1324177 |
| 20 | 2648353 |
| 21 | 5296707 |
| 22 | 10593413 |
| 23 | 21186827 |
| 24 | 42373652 |
| 25 | 84747305 |
| 26 | 169494609 |
| 27 | 338989216 |
| 28 | 677978435 |
| 29 | 1355956869 |
| 30 | 2711913736 |
| 31 | 5423827472 |
| 32 | 10847654948 |
| 33 | 21695309896 |
| 34 | 43390619791 |
| 35 | 86781239586 |
| 36 | 173562479173 |
| 37 | 347124958344 |