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 | 0 |
| 2 | 84 |
| 3 | 105 |
| 4 | 309 |
| 5 | 765 |
| 6 | 884 |
| 7 | 2060 |
| 8 | 4712 |
| 9 | 5405 |
| 10 | 12257 |
| 11 | 27713 |
| 12 | 31752 |
| 13 | 71688 |
| 14 | 161772 |
| 15 | 185313 |
| 16 | 418077 |
| 17 | 943125 |
| 18 | 1080332 |
| 19 | 2436980 |
| 20 | 5497184 |
| 21 | 6296885 |
| 22 | 14204009 |
| 23 | 32040185 |
| 24 | 36701184 |
| 25 | 82787280 |
| 26 | 186744132 |
| 27 | 213910425 |
| 28 | 482519877 |
| 29 | 1088424813 |
| 30 | 1246761572 |