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 | 1 |
| 3 | 1 |
| 4 | 1 |
| 5 | 1 |
| 6 | 1 |
| 7 | 1 |
| 8 | 1 |
| 9 | 1 |
| 10 | 1 |
| 11 | 1 |
| 12 | 1 |
| 13 | 1 |
| 14 | 13 |
| 15 | 25 |
| 16 | 49 |
| 17 | 97 |
| 18 | 193 |
| 19 | 385 |
| 20 | 769 |
| 21 | 1537 |
| 22 | 3073 |
| 23 | 6145 |
| 24 | 12289 |
| 25 | 24577 |
| 26 | 49153 |
| 27 | 98305 |
| 28 | 196597 |
| 29 | 393169 |
| 30 | 786289 |
| 31 | 1572481 |
| 32 | 3144769 |
| 33 | 6289153 |
| 34 | 12577537 |
| 35 | 25153537 |
| 36 | 50304001 |
| 37 | 100601857 |
| 38 | 201191425 |
| 39 | 402358273 |
| 40 | 804667393 |