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 | 1 |
| 2 | 3 |
| 3 | 7 |
| 4 | 13 |
| 5 | 15 |
| 6 | 25 |
| 7 | 39 |
| 8 | 55 |
| 9 | 75 |
| 10 | 85 |
| 11 | 127 |
| 12 | 1947 |
| 13 | 3313 |
| 14 | 4687 |
| 15 | 5947 |
| 16 | 13165 |
| 17 | 23473 |
| 18 | 26607 |
| 19 | 125413 |
| 20 | 209787 |
| 21 | 240937 |
| 22 | 819739 |
| 23 | 1282755 |
| 24 | 1320487 |
| 25 | 1777515 |