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 A261921 Nonpalindromes which are the sum of two palindromes whose lengths differ by 1. 3
 12, 13, 14, 15, 16, 17, 18, 19, 20, 23, 24, 25, 26, 27, 28, 29, 30, 31, 34, 35, 36, 37, 38, 39, 40, 41, 42, 45, 46, 47, 48, 49, 50, 51, 52, 53, 56, 57, 58, 59, 60, 61, 62, 63, 64, 67, 68, 69, 70, 71, 72, 73, 74, 75, 78, 79, 80, 81, 82, 83, 84, 85, 86, 89, 90, 91, 92, 93, 94, 95, 96, 97, 100, 101, 102, 103, 104, 105, 106, 107, 108, 112, 122, 123, 132 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS More than the usual number of terms are displayed in order to show that this is different from A261907. LINKS EXAMPLE 12=11+1 and 100=99+1 are members. 10 is not a member since it is only the sum of two palindromes (5+5) whose lengths are equal. CROSSREFS Cf. A002113. A subsequence of A261907. A261920 shows the differences. Sequence in context: A004501 A071955 A267760 * A101594 A125290 A162792 Adjacent sequences:  A261918 A261919 A261920 * A261922 A261923 A261924 KEYWORD nonn,base AUTHOR David Applegate and N. J. A. Sloane, Sep 15 2015 STATUS approved

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Last modified June 22 21:29 EDT 2021. Contains 345393 sequences. (Running on oeis4.)