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 | 1 |
| 1 | 2 |
| 2 | 3 |
| 3 | 4 |
| 4 | 5 |
| 5 | 8 |
| 6 | 15 |
| 7 | 17 |
| 8 | 69 |
| 9 | 121 |
| 10 | 137 |
| 11 | 467 |
| 12 | 985 |
| 13 | 1949 |
| 14 | 4049 |
| 15 | 8117 |
| 16 | 14641 |
| 17 | 36383 |
| 18 | 62501 |
| 19 | 125003 |
| 20 | 250007 |
| 21 | 958081 |
| 22 | 1817513 |
| 23 | 3325981 |
| 24 | 8062091 |
| 25 | 21233813 |
| 26 | 42467627 |
| 27 | 125828819 |
| 28 | 343955189 |