A113585 - OEIS

%I #7 Aug 24 2022 19:42:48

%S 11,22,33,44,55,66,77,88,99,110,1111,1221,1331,1441,1551,1661,1771,

%T 1881,1991,220,1221,2222,2332,2442,2552,2662,2772,2882,2992,330,1331,

%U 2332,3333,3443,3553,3663,3773,3883,3993,440,1441,2442,3443,4444,4554,4664,4774,4884,4994,550,1551

%N Numbers formed by arranging the digits of n in increasing order concatenated with arranging the digits in decreasing order.

%C a(n) is a palindrome if n is not == 0 (mod 10).

%H Harvey P. Dale, <a href="/A113585/b113585.txt">Table of n, a(n) for n = 1..1000</a>

%e a(10) = 0110 = 110.

%e a(12) = 1221.

%e a(1232) = 12233221

%t iodo[n_]:=Module[{iod=Sort[IntegerDigits[n]]},FromDigits[Join[iod,Reverse[iod]]]]; Array[iodo,60] (* _Harvey P. Dale_, Aug 24 2022 *)

%Y Cf. A113586.

%K base,easy,nonn

%O 1,1

%A _Amarnath Murthy_, Nov 07 2005

%E More terms from Jessica Mabel (jem411(AT)psu.edu), Apr 25 2006