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 | 24 |
| 3 | 56 |
| 4 | 120 |
| 5 | 248 |
| 6 | 504 |
| 7 | 1016 |
| 8 | 2040 |
| 9 | 4088 |
| 10 | 8184 |
| 11 | 16376 |
| 12 | 32760 |
| 13 | 65528 |
| 14 | 131064 |
| 15 | 262136 |
| 16 | 524280 |
| 17 | 1048568 |
| 18 | 2097144 |
| 19 | 4194296 |
| 20 | 8388600 |
| 21 | 16777208 |
| 22 | 33554424 |
| 23 | 67108856 |
| 24 | 134217720 |
| 25 | 268435448 |
| 26 | 536870904 |
| 27 | 1073741816 |
| 28 | 2147483640 |
| 29 | 4294967288 |
| 30 | 8589934584 |
| 31 | 17179869176 |
| 32 | 34359738360 |