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 A113585 Numbers formed by arranging the digits of n in increasing order concatenated with arranging the digits in decreasing order. 4
 11, 22, 33, 44, 55, 66, 77, 88, 99, 110, 1111, 1221, 1331, 1441, 1551, 1661, 1771, 1881, 1991, 220, 1221, 2222, 2332, 2442, 2552, 2662, 2772, 2882, 2992, 330, 1331, 2332, 3333, 3443, 3553, 3663, 3773, 3883, 3993, 440, 1441, 2442, 3443, 4444, 4554, 4664, 4774, 4884, 4994, 550, 1551 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS a(n) is a palindrome if n is not == 0 (mod 10). LINKS Harvey P. Dale, Table of n, a(n) for n = 1..1000 EXAMPLE a(10) = 0110 = 110. a(12) = 1221. a(1232) = 12233221 MATHEMATICA iodo[n_]:=Module[{iod=Sort[IntegerDigits[n]]}, FromDigits[Join[iod, Reverse[iod]]]]; Array[iodo, 60] (* Harvey P. Dale, Aug 24 2022 *) CROSSREFS Cf. A113586. Sequence in context: A004920 A136613 A352535 * A071273 A226467 A244394 Adjacent sequences: A113582 A113583 A113584 * A113586 A113587 A113588 KEYWORD base,easy,nonn AUTHOR Amarnath Murthy, Nov 07 2005 EXTENSIONS More terms from Jessica Mabel (jem411(AT)psu.edu), Apr 25 2006 STATUS approved

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Last modified May 29 22:36 EDT 2024. Contains 372954 sequences. (Running on oeis4.)