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 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 14 |
| 5 | 28 |
| 6 | 57 |
| 7 | 115 |
| 8 | 230 |
| 9 | 460 |
| 10 | 921 |
| 11 | 1843 |
| 12 | 3686 |
| 13 | 7372 |
| 14 | 14745 |
| 15 | 29491 |
| 16 | 58982 |
| 17 | 117964 |
| 18 | 235929 |
| 19 | 471859 |
| 20 | 943718 |
| 21 | 1887436 |
| 22 | 3774873 |
| 23 | 7549747 |
| 24 | 15099494 |
| 25 | 30198988 |
| 26 | 60397977 |
| 27 | 120795955 |
| 28 | 241591910 |
| 29 | 483183820 |
| 30 | 966367641 |
| 31 | 1932735283 |
| 32 | 3865470566 |
| 33 | 7730941132 |
| 34 | 15461882265 |