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) |
|---|---|
| 3 | 7 |
| 4 | 11 |
| 5 | 23 |
| 6 | 59 |
| 7 | 107 |
| 8 | 227 |
| 9 | 503 |
| 10 | 1019 |
| 11 | 2039 |
| 12 | 4079 |
| 13 | 8147 |
| 14 | 16223 |
| 15 | 32603 |
| 16 | 65267 |
| 17 | 130787 |
| 18 | 262127 |
| 19 | 524243 |
| 20 | 1048343 |
| 21 | 2097143 |
| 22 | 4194287 |
| 23 | 8388287 |
| 24 | 16776899 |
| 25 | 33553799 |
| 26 | 67108187 |
| 27 | 134217323 |
| 28 | 268435019 |
| 29 | 536870723 |
| 30 | 1073740439 |
| 31 | 2147483579 |
| 32 | 4294967087 |