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 | 3 |
| 3 | 7 |
| 4 | 12 |
| 5 | 31 |
| 6 | 28 |
| 7 | 127 |
| 8 | 60 |
| 9 | 91 |
| 10 | 124 |
| 11 | 2047 |
| 12 | 168 |
| 13 | 8191 |
| 14 | 508 |
| 15 | 403 |
| 16 | 360 |
| 17 | 131071 |
| 18 | 546 |
| 19 | 524287 |
| 20 | 744 |
| 21 | 1651 |
| 22 | 8188 |
| 23 | 8388607 |
| 24 | 1170 |
| 25 | 3751 |
| 26 | 32764 |
| 27 | 2821 |
| 28 | 3048 |
| 29 | 536870911 |
| 30 | 2418 |
| 31 | 2147483647 |
| 32 | 2880 |
| 33 | 26611 |
| 34 | 524284 |
| 35 | 15367 |
| 36 | 4368 |
| 37 | 137438953471 |
| 38 | 2097148 |
| 39 | 106483 |