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 | 3 |
| 2 | 3 |
| 3 | 5 |
| 4 | 13 |
| 5 | 27 |
| 6 | 51 |
| 7 | 101 |
| 8 | 205 |
| 9 | 411 |
| 10 | 819 |
| 11 | 1637 |
| 12 | 3277 |
| 13 | 6555 |
| 14 | 13107 |
| 15 | 26213 |
| 16 | 52429 |
| 17 | 104859 |
| 18 | 209715 |
| 19 | 419429 |
| 20 | 838861 |
| 21 | 1677723 |
| 22 | 3355443 |
| 23 | 6710885 |
| 24 | 13421773 |
| 25 | 26843547 |
| 26 | 53687091 |
| 27 | 107374181 |
| 28 | 214748365 |
| 29 | 429496731 |
| 30 | 858993459 |
| 31 | 1717986917 |
| 32 | 3435973837 |