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 | 3 |
| 2 | 4 |
| 3 | 5 |
| 4 | 7 |
| 5 | 15 |
| 6 | 55 |
| 7 | 211 |
| 8 | 391 |
| 9 | 595 |
| 10 | 3461 |
| 11 | 5029 |
| 12 | 5220 |
| 13 | 5333 |
| 14 | 8073 |
| 15 | 15797 |
| 16 | 16132 |
| 17 | 21457 |
| 18 | 29283 |
| 19 | 78791 |
| 20 | 85143 |
| 21 | 179973 |
| 22 | 211030 |
| 23 | 445774 |
| 24 | 464844 |
| 25 | 511057 |