A120534 - OEIS

%I #18 Sep 23 2022 07:23:12

%S 52,124,188,238,246,268,290,292,322,406,426,430,474,498,518,530,556,

%T 628,658,668,670,782,892,894,902,964,1002,1028,1074,1102,1146,1162,

%U 1222,1246,1258,1266,1342,1348,1388,1398,1406,1506,1510,1542,1578,1588,1682,1732,1758,1842,1844,1852

%N Untouchable 3-almost primes.

%C Numbers having 3 prime factors (with multiplicity) and which are not the sum of the aliquot parts of any number.

%C 2 and 5 are almost surely the only untouchable primes.

%H Amiram Eldar, <a href="/A120534/b120534.txt">Table of n, a(n) for n = 1..10000</a> (terms 1..1000 from Giovanni Resta)

%Y Intersection of A005114 and A014612.

%Y Cf. A119379.

%K nonn

%O 1,1

%A _Jonathan Vos Post_, Aug 06 2006