%I #6 Dec 09 2015 21:40:36
%S 0,1,2,2,11,11,11,11,22,22,101,101,101,111,111,111,121,121,121,121,
%T 202,202,202,212,212,212,222,222,1001,1001,1001,1001,1001,1001,1001,
%U 1001,1001,1001,1001,1001,1111,1111,1111,1111,1111,1111,1111,1111,1111,1111,1111,1111,1221,1221,1221,1221,2002,2002,2002,2002
%N Largest base-3 palindrome m <= n, written in base 3.
%Y Sequences related to palindromic floor and ceiling: A175298, A206913, A206914, A261423, A262038, and the large block of consecutive sequences beginning at A265509.
%K nonn,base
%O 0,3
%A _N. J. A. Sloane_, Dec 09 2015
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