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a(n) = A061909(n) with digits reversed.
3

%I #6 Dec 01 2024 14:30:27

%S 1,2,3,1,11,21,31,2,12,22,3,13,1,101,201,301,11,111,211,311,21,121,

%T 221,31,2,102,202,12,112,212,22,122,3,103,13,113,1,1001,2001,3001,101,

%U 1101,2101,3101,201,1201,2201,301,1301,11,1011,2011

%N a(n) = A061909(n) with digits reversed.

%H T. D. Noe, <a href="/A129969/b129969.txt">Table of n, a(n) for n=1..5000</a>

%t Rest[IntegerReverse/@Select[Range[0,1200],IntegerReverse[#^2]==IntegerReverse[#]^2&]] (* _Harvey P. Dale_, Dec 01 2024 *)

%K nonn,base

%O 1,2

%A _N. J. A. Sloane_, Jun 13 2007