A function defined for all positive integers, sometimes also called an arithmetic function (Nagell 1951, p. 26) or number theoretic function (Wilf 1994, p. 58).
Integer Function
See also
Complex Matrix, Difference Equation, Number Theoretic Function, Real MatrixRelated Wolfram sites
http://functions.wolfram.com/IntegerFunctions/Explore with Wolfram|Alpha
References
Nagell, T. "Arithmetical Functions." §9 in Introduction to Number Theory. New York: Wiley, pp. 26-29, 1951.Wilf, H. Generatingfunctionology, 2nd ed. New York: Academic Press, p. 58, 1994.Referenced on Wolfram|Alpha
Integer FunctionCite this as:
Weisstein, Eric W. "Integer Function." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/IntegerFunction.html