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) |
|---|---|
| 3 | 3 |
| 4 | 21 |
| 5 | 61 |
| 6 | 205 |
| 7 | 474 |
| 8 | 1246 |
| 9 | 2723 |
| 10 | 6277 |
| 11 | 12961 |
| 12 | 28682 |
| 13 | 56976 |
| 14 | 118919 |
| 15 | 234715 |
| 16 | 473988 |
| 17 | 913011 |
| 18 | 1807211 |
| 19 | 3430048 |
| 20 | 6648397 |
| 21 | 12500170 |
| 22 | 23764885 |
| 23 | 44174088 |
| 24 | 83090853 |
| 25 | 152803509 |
| 26 | 283387971 |
| 27 | 517516615 |
| 28 | 949775754 |
| 29 | 1719088271 |
| 30 | 3127641937 |
| 31 | 5618833687 |
| 32 | 10133255636 |