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 | 3 |
| 1 | 2 |
| 2 | 19 |
| 3 | 17 |
| 4 | 67 |
| 5 | 131 |
| 6 | 523 |
| 7 | 257 |
| 8 | 1033 |
| 9 | 2053 |
| 10 | 4099 |
| 11 | 8209 |
| 12 | 16417 |
| 13 | 32771 |
| 14 | 65539 |
| 15 | 65537 |
| 16 | 262147 |
| 17 | 524353 |
| 18 | 1048609 |
| 19 | 2097169 |
| 20 | 4194433 |
| 21 | 8388617 |
| 22 | 16777729 |
| 23 | 67108913 |
| 24 | 67239937 |
| 25 | 134250497 |
| 26 | 268435459 |
| 27 | 536903681 |
| 28 | 1073741827 |
| 29 | 2147483713 |
| 30 | 8589934627 |
| 31 | 8589934609 |
| 32 | 17179869697 |