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) |
|---|---|
| 2 | 1 |
| 3 | 2 |
| 4 | 3 |
| 5 | 7 |
| 6 | 14 |
| 7 | 28 |
| 8 | 57 |
| 9 | 113 |
| 10 | 227 |
| 11 | 437 |
| 12 | 834 |
| 13 | 1616 |
| 14 | 3143 |
| 15 | 6144 |
| 16 | 12036 |
| 17 | 23467 |
| 18 | 45713 |
| 19 | 89375 |
| 20 | 175722 |
| 21 | 346193 |
| 22 | 681828 |
| 23 | 1344815 |
| 24 | 2657630 |
| 25 | 5253615 |
| 26 | 10374965 |
| 27 | 20471599 |
| 28 | 40401901 |
| 29 | 79871358 |
| 30 | 158182869 |
| 31 | 313402574 |
| 32 | 620776183 |
| 33 | 1228390053 |
| 34 | 2430853614 |
| 35 | 4813878134 |
| 36 | 9550070608 |