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Palindromic and divisible by 3.
2

%I #10 Apr 14 2023 15:56:46

%S 3,6,9,33,66,99,111,141,171,222,252,282,303,333,363,393,414,444,474,

%T 525,555,585,606,636,666,696,717,747,777,828,858,888,909,939,969,999,

%U 1221,1551,1881,2112,2442,2772,3003,3333,3663,3993,4224,4554,4884,5115

%N Palindromic and divisible by 3.

%H Harvey P. Dale, <a href="/A045638/b045638.txt">Table of n, a(n) for n = 1..2000</a>

%t Select[Range[3,5500,3],PalindromeQ] (* _Harvey P. Dale_, Apr 14 2023 *)

%K nonn,base

%O 1,1

%A _Jeff Burch_