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 | 48 |
| 2 | 82 |
| 3 | 188 |
| 4 | 364 |
| 5 | 644 |
| 6 | 1320 |
| 7 | 2584 |
| 8 | 4842 |
| 9 | 9412 |
| 10 | 18210 |
| 11 | 35192 |
| 12 | 68158 |
| 13 | 130812 |
| 14 | 253334 |
| 15 | 491376 |
| 16 | 945170 |
| 17 | 1825292 |
| 18 | 3533066 |
| 19 | 6818232 |
| 20 | 13167414 |
| 21 | 25439060 |
| 22 | 49131310 |
| 23 | 94931752 |
| 24 | 183337586 |
| 25 | 354061772 |
| 26 | 684091450 |
| 27 | 1321342040 |
| 28 | 2551947046 |
| 29 | 4929738068 |