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 | 3 |
| 2 | 7 |
| 3 | 14 |
| 4 | 29 |
| 5 | 59 |
| 6 | 119 |
| 7 | 238 |
| 8 | 477 |
| 9 | 955 |
| 10 | 1911 |
| 11 | 3822 |
| 12 | 7645 |
| 13 | 15291 |
| 14 | 30583 |
| 15 | 61166 |
| 16 | 122333 |
| 17 | 244667 |
| 18 | 489335 |
| 19 | 978670 |
| 20 | 1957341 |
| 21 | 3914683 |
| 22 | 7829367 |
| 23 | 15658734 |
| 24 | 31317469 |
| 25 | 62634939 |
| 26 | 125269879 |
| 27 | 250539758 |
| 28 | 501079517 |
| 29 | 1002159035 |
| 30 | 2004318071 |
| 31 | 4008636142 |
| 32 | 8017272285 |