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) |
|---|---|
| 0 | 1 |
| 1 | 6 |
| 2 | 16 |
| 3 | 96 |
| 4 | 256 |
| 5 | 1536 |
| 6 | 4096 |
| 7 | 24576 |
| 8 | 65536 |
| 9 | 393216 |
| 10 | 1048576 |
| 11 | 6291456 |
| 12 | 16777216 |
| 13 | 100663296 |
| 14 | 268435456 |
| 15 | 1610612736 |
| 16 | 4294967296 |
| 17 | 25769803776 |
| 18 | 68719476736 |
| 19 | 412316860416 |
| 20 | 1099511627776 |
| 21 | 6597069766656 |
| 22 | 17592186044416 |
| 23 | 105553116266496 |
| 24 | 281474976710656 |