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 | 10 |
| 1 | 11 |
| 2 | 13 |
| 3 | 17 |
| 4 | 25 |
| 5 | 41 |
| 6 | 73 |
| 7 | 137 |
| 8 | 265 |
| 9 | 521 |
| 10 | 1033 |
| 11 | 2057 |
| 12 | 4105 |
| 13 | 8201 |
| 14 | 16393 |
| 15 | 32777 |
| 16 | 65545 |
| 17 | 131081 |
| 18 | 262153 |
| 19 | 524297 |
| 20 | 1048585 |
| 21 | 2097161 |
| 22 | 4194313 |
| 23 | 8388617 |
| 24 | 16777225 |
| 25 | 33554441 |
| 26 | 67108873 |
| 27 | 134217737 |
| 28 | 268435465 |
| 29 | 536870921 |
| 30 | 1073741833 |
| 31 | 2147483657 |
| 32 | 4294967305 |