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Numbers with exactly 4 palindromic prime factors (counted with multiplicity).
2

%I #11 Aug 14 2024 13:12:28

%S 16,24,36,40,54,56,60,81,84,88,90,100,126,132,135,140,150,189,196,198,

%T 210,220,225,250,294,297,308,315,330,350,375,441,462,484,490,495,525,

%U 550,625,686,693,726,735,770,808,825,875,1029,1048,1078,1089,1155,1208

%N Numbers with exactly 4 palindromic prime factors (counted with multiplicity).

%H Andrew Howroyd, <a href="/A046370/b046370.txt">Table of n, a(n) for n = 1..1000</a>

%Y Intersection of A033620 and A014613.

%Y Cf. A046402.

%K nonn,base

%O 1,1

%A _Patrick De Geest_, Jun 15 1998

%E Offset changed by _Andrew Howroyd_, Aug 14 2024