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 | 5 |
| 4 | 11 |
| 5 | 17 |
| 6 | 39 |
| 7 | 65 |
| 8 | 139 |
| 9 | 261 |
| 10 | 531 |
| 11 | 1025 |
| 12 | 2095 |
| 13 | 4097 |
| 14 | 8259 |
| 15 | 16405 |
| 16 | 32907 |
| 17 | 65537 |
| 18 | 131367 |
| 19 | 262145 |
| 20 | 524827 |
| 21 | 1048645 |
| 22 | 2098179 |
| 23 | 4194305 |
| 24 | 8390831 |
| 25 | 16777233 |
| 26 | 33558531 |
| 27 | 67109125 |
| 28 | 134225995 |
| 29 | 268435457 |
| 30 | 536887863 |
| 31 | 1073741825 |
| 32 | 2147516555 |
| 33 | 4294968325 |
| 34 | 8590000131 |