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 A113614 Least number whose absolute difference of successive digits gives the n-th palindrome (A002113), or 0 if no such number exists. 0
 121, 131, 141, 151, 161, 171, 181, 191, 0, 1001, 1012, 1021, 1032, 1043, 1054, 1065, 1076, 1087, 1098, 0 (list; graph; refs; listen; history; text; internal format)
 OFFSET 10,1 COMMENTS 1. a(n) =0 if n begins with 9 and contains odd number of digit. e.g. 919,92129, etc. Are there other valus of n for which a(n) = 0? 2. If n contains begins with 9 as a digit and contains even number of digits then a(n) is a palindrome. LINKS Table of n, a(n) for n=10..29. EXAMPLE a(99) = 909 a(191) = 1098. 1 - 0 = 1, 0 ~ 9 = 9, 9 - 8 = 1. a(9119)= 90109. CROSSREFS Cf. A002113. Sequence in context: A036231 A055468 A134328 * A134941 A173070 A044867 Adjacent sequences: A113611 A113612 A113613 * A113615 A113616 A113617 KEYWORD base,more,nonn,uned AUTHOR Amarnath Murthy, Nov 09 2005 STATUS approved

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Last modified December 3 02:48 EST 2023. Contains 367530 sequences. (Running on oeis4.)