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 | 153 |
| 2 | 159 |
| 3 | 169 |
| 4 | 189 |
| 5 | 225 |
| 6 | 297 |
| 7 | 433 |
| 8 | 705 |
| 9 | 1233 |
| 10 | 2289 |
| 11 | 4369 |
| 12 | 8529 |
| 13 | 16785 |
| 14 | 33297 |
| 15 | 66193 |
| 16 | 131985 |
| 17 | 263313 |
| 18 | 525969 |
| 19 | 1050769 |
| 20 | 2100369 |
| 21 | 4198545 |
| 22 | 8394897 |
| 23 | 16785553 |
| 24 | 33566865 |
| 25 | 67125393 |
| 26 | 134242449 |
| 27 | 268468369 |
| 28 | 536920209 |
| 29 | 1073807505 |
| 30 | 2147582097 |
| 31 | 4295098513 |