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 | 1 |
| 2 | 4 |
| 3 | 3 |
| 4 | 16 |
| 5 | 5 |
| 6 | 64 |
| 7 | 7 |
| 8 | 256 |
| 9 | 9 |
| 10 | 1024 |
| 11 | 11 |
| 12 | 4096 |
| 13 | 13 |
| 14 | 16384 |
| 15 | 15 |
| 16 | 65536 |
| 17 | 17 |
| 18 | 262144 |
| 19 | 19 |
| 20 | 1048576 |
| 21 | 21 |
| 22 | 4194304 |
| 23 | 23 |
| 24 | 16777216 |
| 25 | 25 |
| 26 | 67108864 |
| 27 | 27 |
| 28 | 268435456 |
| 29 | 29 |
| 30 | 1073741824 |
| 31 | 31 |