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 | 4 |
| 3 | 7 |
| 4 | 13 |
| 5 | 26 |
| 6 | 49 |
| 7 | 99 |
| 8 | 194 |
| 9 | 387 |
| 10 | 773 |
| 11 | 1538 |
| 12 | 3081 |
| 13 | 6147 |
| 14 | 12298 |
| 15 | 24587 |
| 16 | 49157 |
| 17 | 98330 |
| 18 | 196609 |
| 19 | 393251 |
| 20 | 786450 |
| 21 | 1572883 |
| 22 | 3145797 |
| 23 | 6291442 |
| 24 | 12583033 |
| 25 | 25165827 |
| 26 | 50331738 |
| 27 | 100663451 |
| 28 | 201326533 |
| 29 | 402653578 |
| 30 | 805306225 |
| 31 | 1610613155 |
| 32 | 3221225698 |