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 | 3 |
| 5 | 6 |
| 6 | 17 |
| 7 | 42 |
| 8 | 102 |
| 9 | 242 |
| 10 | 564 |
| 11 | 1296 |
| 12 | 2944 |
| 13 | 6624 |
| 14 | 14784 |
| 15 | 32768 |
| 16 | 72192 |
| 17 | 158208 |
| 18 | 345088 |
| 19 | 749568 |
| 20 | 1622016 |
| 21 | 3497984 |
| 22 | 7520256 |
| 23 | 16121856 |
| 24 | 34471936 |
| 25 | 73531392 |
| 26 | 156499968 |
| 27 | 332398592 |
| 28 | 704643072 |
| 29 | 1491075072 |
| 30 | 3149922304 |
| 31 | 6643777536 |
| 32 | 13992198144 |