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 | 262144 |
| 3 | 32768 |
| 4 | 4096 |
| 5 | 512 |
| 6 | 64 |
| 7 | 73786976294838206464 |
| 8 | 8 |
| 9 | 9223372036854775808 |
| 10 | 1073741824 |
| 11 | 1152921504606846976 |
| 12 | 1237940039285380274899124224 |
| 13 | 134217728 |
| 14 | 144115188075855872 |
| 15 | 154742504910672534362390528 |
| 16 | 16777216 |