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 | 1 |
| 2 | 1 |
| 3 | 8 |
| 4 | 4 |
| 5 | 128 |
| 6 | 128 |
| 7 | 1024 |
| 8 | 256 |
| 9 | 32768 |
| 10 | 32768 |
| 11 | 262144 |
| 12 | 131072 |
| 13 | 4194304 |
| 14 | 4194304 |
| 15 | 33554432 |
| 16 | 4194304 |
| 17 | 2147483648 |
| 18 | 2147483648 |
| 19 | 17179869184 |
| 20 | 8589934592 |
| 21 | 274877906944 |
| 22 | 274877906944 |
| 23 | 2199023255552 |
| 24 | 549755813888 |
| 25 | 70368744177664 |