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 | 1 |
| 3 | 1 |
| 4 | 3 |
| 5 | 7 |
| 6 | 25 |
| 7 | 49 |
| 8 | 109 |
| 9 | 229 |
| 10 | 481 |
| 11 | 1003 |
| 12 | 2019 |
| 13 | 4051 |
| 14 | 8143 |
| 15 | 16309 |
| 16 | 32683 |
| 17 | 65439 |
| 18 | 131007 |
| 19 | 262081 |
| 20 | 524187 |
| 21 | 1048423 |
| 22 | 2097027 |
| 23 | 4194147 |
| 24 | 8388481 |
| 25 | 16777039 |
| 26 | 33554269 |
| 27 | 67108699 |
| 28 | 134217529 |
| 29 | 268435227 |
| 30 | 536870713 |
| 31 | 1073741607 |
| 32 | 2147483371 |
| 33 | 4294967043 |
| 34 | 8589934267 |
| 35 | 17179868869 |