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 | 32 |
| 1 | 63 |
| 2 | 125 |
| 3 | 249 |
| 4 | 497 |
| 5 | 993 |
| 6 | 1985 |
| 7 | 3969 |
| 8 | 7937 |
| 9 | 15873 |
| 10 | 31745 |
| 11 | 63489 |
| 12 | 126977 |
| 13 | 253953 |
| 14 | 507905 |
| 15 | 1015809 |
| 16 | 2031617 |
| 17 | 4063233 |
| 18 | 8126465 |
| 19 | 16252929 |
| 20 | 32505857 |
| 21 | 65011713 |
| 22 | 130023425 |
| 23 | 260046849 |
| 24 | 520093697 |
| 25 | 1040187393 |
| 26 | 2080374785 |
| 27 | 4160749569 |
| 28 | 8321499137 |
| 29 | 16642998273 |