A261921 Nonpalindromes which are the sum of two palindromes whose lengths differ by 1.

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

Offset: 1

Author

David Applegate and N. J. A. Sloane, Sep 15 2015

Keywords

• nonn
• base

Comments

More than the usual number of terms are displayed in order to show that this is different from A261907.

Examples

			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.