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) |
|---|---|
| 5 | 1 |
| 6 | 1 |
| 7 | 3 |
| 8 | 7 |
| 9 | 19 |
| 10 | 46 |
| 11 | 124 |
| 12 | 320 |
| 13 | 858 |
| 14 | 2282 |
| 15 | 6161 |
| 16 | 16647 |
| 17 | 45352 |
| 18 | 123861 |
| 19 | 340000 |
| 20 | 936098 |
| 21 | 2586518 |
| 22 | 7166394 |
| 23 | 19911638 |
| 24 | 55456892 |
| 25 | 154814055 |
| 26 | 433081632 |
| 27 | 1213901668 |
| 28 | 3408659401 |
| 29 | 9587879987 |
| 30 | 27011564035 |
| 31 | 76212078500 |