A190892 - OEIS

%I #18 Feb 13 2021 01:09:54

%S 192,216,240,288,320,336,360,384,432,448,480,504,528,540,560,576,600,

%T 624,640,648,672,704,720,756,768,792,800,810,816,832,840,864,880,896,

%U 900,912,936,960,972,1000,1008,1024,1040,1056,1080,1088,1104,1120,1134

%N Numbers that can be written as a*b = c*d*e, where a, b, c, d, and e are distinct composite numbers.

%C Similar to A175340, but without the requirement that the composite numbers be consecutive. In this case, the k in A175340 can be taken to be 2.

%C Almost all numbers are in this sequence. Its complement has density O(n (log log n)^4/log n). - _Charles R Greathouse IV_, May 23 2011

%H T. D. Noe, <a href="/A190892/b190892.txt">Table of n, a(n) for n = 1..1000</a>

%e 192 = 12*16 = 4*6*8.

%Y Cf. A162247 (all factorizations of numbers), A175340.

%Y A339245 is a subsequence.

%K nonn

%O 1,1

%A _T. D. Noe_, May 23 2011