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 | 0 |
| 1 | 0 |
| 2 | 1 |
| 3 | 3 |
| 4 | 6 |
| 5 | 13 |
| 6 | 28 |
| 7 | 56 |
| 8 | 113 |
| 9 | 231 |
| 10 | 464 |
| 11 | 930 |
| 12 | 1875 |
| 13 | 3766 |
| 14 | 7547 |
| 15 | 15151 |
| 16 | 30398 |
| 17 | 60917 |
| 18 | 122116 |
| 19 | 244786 |
| 20 | 490435 |
| 21 | 982544 |
| 22 | 1968413 |
| 23 | 3942649 |
| 24 | 7896116 |
| 25 | 15813268 |
| 26 | 31665423 |
| 27 | 63403245 |
| 28 | 126945244 |
| 29 | 254152625 |
| 30 | 508798604 |
| 31 | 1018538560 |
| 32 | 2038870881 |
| 33 | 4081149015 |
| 34 | 8168806568 |