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) |
|---|---|
| 2 | 4 |
| 3 | 15 |
| 4 | 12 |
| 5 | 25 |
| 6 | 55 |
| 7 | 112 |
| 8 | 188 |
| 9 | 438 |
| 10 | 789 |
| 11 | 1573 |
| 12 | 3135 |
| 13 | 5980 |
| 14 | 11848 |
| 15 | 23035 |
| 16 | 45020 |
| 17 | 87873 |
| 18 | 171910 |
| 19 | 335464 |
| 20 | 655397 |
| 21 | 1281190 |
| 22 | 2501173 |
| 23 | 4888098 |
| 24 | 9548543 |
| 25 | 18653025 |
| 26 | 36441500 |
| 27 | 71190933 |
| 28 | 139076320 |
| 29 | 271694910 |
| 30 | 530784135 |
| 31 | 1036914040 |
| 32 | 2025703900 |
| 33 | 3957367099 |
| 34 | 7731003525 |