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) |
|---|---|
| 0 | 2 |
| 1 | 5 |
| 2 | 13 |
| 3 | 27 |
| 4 | 49 |
| 5 | 83 |
| 6 | 137 |
| 7 | 227 |
| 8 | 385 |
| 9 | 675 |
| 10 | 1225 |
| 11 | 2291 |
| 12 | 4385 |
| 13 | 8531 |
| 14 | 16777 |
| 15 | 33219 |
| 16 | 66049 |
| 17 | 131651 |
| 18 | 262793 |
| 19 | 525011 |
| 20 | 1049377 |
| 21 | 2098035 |
| 22 | 4195273 |
| 23 | 8389667 |
| 24 | 16778369 |
| 25 | 33555683 |
| 26 | 67110217 |
| 27 | 134219187 |
| 28 | 268437025 |
| 29 | 536872595 |
| 30 | 1073743625 |
| 31 | 2147485571 |
| 32 | 4294969345 |
| 33 | 8589936771 |