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 | 4 |
| 2 | 4 |
| 3 | 4 |
| 4 | 24 |
| 5 | 24 |
| 6 | 64 |
| 7 | 144 |
| 8 | 224 |
| 9 | 544 |
| 10 | 1024 |
| 11 | 1984 |
| 12 | 4224 |
| 13 | 8064 |
| 14 | 16384 |
| 15 | 33024 |
| 16 | 65024 |
| 17 | 131584 |
| 18 | 262144 |
| 19 | 523264 |
| 20 | 1050624 |
| 21 | 2095104 |
| 22 | 4194304 |
| 23 | 8392704 |
| 24 | 16769024 |
| 25 | 33562624 |
| 26 | 67108864 |
| 27 | 134201344 |
| 28 | 268468224 |
| 29 | 536838144 |
| 30 | 1073741824 |
| 31 | 2147549184 |
| 32 | 4294836224 |
| 33 | 8590065664 |