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 | 4 |
| 2 | 8 |
| 3 | 14 |
| 4 | 26 |
| 5 | 46 |
| 6 | 86 |
| 7 | 158 |
| 8 | 302 |
| 9 | 574 |
| 10 | 1118 |
| 11 | 2174 |
| 12 | 4286 |
| 13 | 8446 |
| 14 | 16766 |
| 15 | 33278 |
| 16 | 66302 |
| 17 | 132094 |
| 18 | 263678 |
| 19 | 526334 |
| 20 | 1051646 |
| 21 | 2101246 |
| 22 | 4200446 |
| 23 | 8396798 |
| 24 | 16789502 |
| 25 | 33570814 |
| 26 | 67133438 |
| 27 | 134250494 |
| 28 | 268484606 |
| 29 | 536936446 |
| 30 | 1073840126 |
| 31 | 2147614718 |
| 32 | 4295163902 |