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) |
|---|---|
| 4 | 1 |
| 5 | 4 |
| 6 | 14 |
| 7 | 47 |
| 8 | 152 |
| 9 | 472 |
| 10 | 1408 |
| 11 | 4048 |
| 12 | 11264 |
| 13 | 30464 |
| 14 | 80384 |
| 15 | 207616 |
| 16 | 526336 |
| 17 | 1312768 |
| 18 | 3227648 |
| 19 | 7835648 |
| 20 | 18808832 |
| 21 | 44695552 |
| 22 | 105250816 |
| 23 | 245825536 |
| 24 | 569901056 |
| 25 | 1312292864 |
| 26 | 3003121664 |
| 27 | 6833569792 |
| 28 | 15468593152 |
| 29 | 34846277632 |
| 30 | 78148272128 |
| 31 | 174533378048 |
| 32 | 388291887104 |