A079731 Fundamental piano frequencies in Hertz rounded to nearest integer.
28, 55, 110, 220, 440, 880, 1760, 3520
Offset: 0
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Formula
a(n)=round(27.5*2^n), n=0...7.
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.