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A046443 Composite numbers whose 3 prime factors are distinct in length. 1

%I #19 May 30 2023 06:53:52

%S 2222,2266,2354,2398,2486,2626,2678,2782,2794,2834,2882,2938,3014,

%T 3058,3278,3302,3322,3333,3399,3406,3434,3454,3502,3531,3562,3586,

%U 3597,3614,3638,3674,3706,3729,3806,3838,3842,3874,3914,3926,3938,3939,3982,4017

%N Composite numbers whose 3 prime factors are distinct in length.

%C Equivalently, the products of 3 prime numbers that have distinct lengths when written in decimal. - _Peter Munn_, May 30 2023

%e 2882 because 2882 = 2 * 11 * 131, which have 1, 2, and 3 digits, respectively.

%Y Subsequence of A007304.

%K nonn,base

%O 1,1

%A _Patrick De Geest_, Jul 15 1998

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Last modified August 11 23:45 EDT 2024. Contains 375082 sequences. (Running on oeis4.)