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 | 5 |
| 3 | 11 |
| 4 | 23 |
| 5 | 47 |
| 6 | 101 |
| 7 | 233 |
| 8 | 467 |
| 9 | 941 |
| 10 | 1889 |
| 11 | 3779 |
| 12 | 7559 |
| 13 | 15131 |
| 14 | 30323 |
| 15 | 60647 |
| 16 | 121403 |
| 17 | 242807 |
| 18 | 486041 |
| 19 | 972533 |
| 20 | 1945649 |
| 21 | 3891467 |
| 22 | 7783541 |
| 23 | 15567089 |
| 24 | 31139561 |
| 25 | 62279171 |
| 26 | 124559609 |
| 27 | 249120239 |
| 28 | 498270791 |
| 29 | 996541661 |
| 30 | 1993083437 |
| 31 | 3986167223 |
| 32 | 7972334723 |
| 33 | 15944673761 |