A spectrum sequence is a sequence formed by successive multiples of a real number 
rounded down to the nearest integer 
. If 
is irrational, the spectrum
is called a Beatty sequence.
Spectrum Sequence
See also
Beatty Sequence, Lagrange Spectrum, Markov SpectrumExplore with Wolfram|Alpha
Cite this as:
Weisstein, Eric W. "Spectrum Sequence." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/SpectrumSequence.html