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 | 0 |
| 2 | 1 |
| 3 | 5 |
| 4 | 7 |
| 5 | 53 |
| 6 | 61 |
| 7 | 119 |
| 8 | 127 |
| 9 | 1973 |
| 10 | 2037 |
| 11 | 4029 |
| 12 | 4093 |
| 13 | 16247 |
| 14 | 16375 |
| 15 | 32639 |
| 16 | 32767 |
| 17 | 1046453 |
| 18 | 1048501 |
| 19 | 2095093 |
| 20 | 2097141 |
| 21 | 8384445 |
| 22 | 8388541 |
| 23 | 16773117 |
| 24 | 16777213 |
| 25 | 134201207 |
| 26 | 134217591 |
| 27 | 268419063 |
| 28 | 268435447 |
| 29 | 1073708927 |
| 30 | 1073741695 |
| 31 | 2147450879 |
| 32 | 2147483647 |
| 33 | 137437902773 |