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Smallest of the most frequently occurring numbers in 1-to-n 4-dimensional multiplication table.
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%I #9 Jan 15 2019 10:01:10

%S 1,4,6,24,60,60,60,96,144,360,360,720,720,720,720,1440,1440,1440,1440,

%T 1440,5040,5040,5040,5040,5040,5040,4320,10080,10080,10080,10080,

%U 10080,10080,10080,10080,30240,30240,30240,30240,30240,30240,30240,30240,30240,30240,30240,30240,30240,30240,30240

%N Smallest of the most frequently occurring numbers in 1-to-n 4-dimensional multiplication table.

%e M(n) is the array in which m(x,y,z,t)=x*y*z*t for x = 1 to n, y = 1 to n, z = 1 to n and t = 1 to n In M(7), the most frequently occurring numbers are 60, 72, 84, 120 and 168, each occurring 60 times. The smallest of these numbers is 60, so a(7) = 60.

%Y Cf. A057144, A057340, A057341, A057342, A057346.

%K nonn

%O 1,2

%A _Neil Fernandez_, Aug 28 2000

%E a(16)-a(50) from _Charlie Neder_, Jan 15 2019