A046329 - OEIS

%I #12 Dec 24 2021 15:07:25

%S 8,44,66,99,171,212,222,242,282,292,333,343,363,404,434,474,494,555,

%T 575,595,606,646,747,777,909,969,1001,1221,1331,1551,1771,2222,2882,

%U 3333,3553,4334,4994,5335,5555,5665,5885,5995,6226,6446,6886,7337,7557

%N Palindromes with exactly 3 prime factors (counted with multiplicity).

%H John Cerkan, <a href="/A046329/b046329.txt">Table of n, a(n) for n = 1..10000</a>

%t Select[Range[8000],PalindromeQ[#]&&PrimeOmega[#]==3&] (* _Harvey P. Dale_, Dec 24 2021 *)

%Y Cf. A014612, A046316, A046409.

%K nonn,base

%O 1,1

%A _Patrick De Geest_, Jun 15 1998