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 | 11 |
| 1 | 12 |
| 2 | 14 |
| 3 | 18 |
| 4 | 26 |
| 5 | 42 |
| 6 | 74 |
| 7 | 138 |
| 8 | 266 |
| 9 | 522 |
| 10 | 1034 |
| 11 | 2058 |
| 12 | 4106 |
| 13 | 8202 |
| 14 | 16394 |
| 15 | 32778 |
| 16 | 65546 |
| 17 | 131082 |
| 18 | 262154 |
| 19 | 524298 |
| 20 | 1048586 |
| 21 | 2097162 |
| 22 | 4194314 |
| 23 | 8388618 |
| 24 | 16777226 |
| 25 | 33554442 |
| 26 | 67108874 |
| 27 | 134217738 |
| 28 | 268435466 |
| 29 | 536870922 |
| 30 | 1073741834 |
| 31 | 2147483658 |
| 32 | 4294967306 |