|
%I #6 Oct 11 2013 10:28:28
%S 36,56,84,100,132,136,152,228,340,344,372,376,472,484,488,532,546,564,
%T 568,580,621,632,686,708,770,804,808,820,846,852,856,868,872,950,1012,
%U 1192,1204,1206,1208,1274,1304,1326,1336,1444,1524,1550,1572,1576,1690
%N Numbers n such that n and n+4 are 4-almost primes.
%H Charles R Greathouse IV, <a href="/A124941/b124941.txt">Table of n, a(n) for n = 1..10000</a>
%e 36=2^2*3^2, 40=2^3*5; 56=2^3*7, 60=2^2*3*5.
%o (PARI) isok(n) = (bigomega(n) == 4) && (bigomega(n+4) == 4); \\ _Michel Marcus_, Oct 11 2013
%Y Cf. A124940, A124942.
%K nonn
%O 1,1
%A _Zak Seidov_, Nov 13 2006
|
