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 | 8 |
| 2 | 7 |
| 3 | 21 |
| 4 | 36 |
| 5 | 90 |
| 6 | 184 |
| 7 | 376 |
| 8 | 832 |
| 9 | 1744 |
| 10 | 3684 |
| 11 | 7908 |
| 12 | 16724 |
| 13 | 35532 |
| 14 | 75700 |
| 15 | 160628 |
| 16 | 341460 |
| 17 | 726132 |
| 18 | 1542596 |
| 19 | 3278948 |
| 20 | 6969732 |
| 21 | 14811684 |
| 22 | 31481860 |
| 23 | 66911620 |
| 24 | 142208964 |
| 25 | 302253508 |
| 26 | 642403076 |
| 27 | 1365342212 |
| 28 | 2901889028 |
| 29 | 6167616388 |
| 30 | 13108516100 |