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A046400 Numbers with exactly 2 distinct palindromic prime factors. 4

%I #11 Apr 03 2021 08:43:38

%S 6,10,14,15,21,22,33,35,55,77,202,262,302,303,362,382,393,453,505,543,

%T 573,626,655,706,707,746,755,766,905,917,939,955,1057,1059,1111,1119,

%U 1149,1267,1337,1441,1454,1514,1565,1574,1594,1661,1765,1838,1858,1865

%N Numbers with exactly 2 distinct palindromic prime factors.

%H Amiram Eldar, <a href="/A046400/b046400.txt">Table of n, a(n) for n = 1..10000</a>

%t Select[Range[2000], (f = FactorInteger[#])[[;; , 2]] == {1, 1} && And @@ PalindromeQ /@ f[[;; , 1]] &] (* _Amiram Eldar_, Apr 03 2021 *)

%Y Cf. A001358, A046368.

%K nonn,base

%O 1,1

%A _Patrick De Geest_, Jun 15 1998

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)