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 | 2 |
| 2 | 5 |
| 3 | 10 |
| 4 | 21 |
| 5 | 43 |
| 6 | 86 |
| 7 | 173 |
| 8 | 346 |
| 9 | 693 |
| 10 | 1386 |
| 11 | 2773 |
| 12 | 5546 |
| 13 | 11093 |
| 14 | 22186 |
| 15 | 44373 |
| 16 | 88746 |
| 17 | 177493 |
| 18 | 354986 |
| 19 | 709973 |
| 20 | 1419946 |
| 21 | 2839893 |
| 22 | 5679786 |
| 23 | 11359573 |
| 24 | 22719146 |
| 25 | 45438293 |
| 26 | 90876586 |
| 27 | 181753173 |
| 28 | 363506346 |
| 29 | 727012693 |
| 30 | 1454025386 |
| 31 | 2908050773 |
| 32 | 5816101546 |
| 33 | 11632203093 |