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A114120
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Palindromes which are not the arithmetic mean of two distinct positive palindromes.
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1
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1, 11, 10901, 109901, 1090901, 1099901, 10900901, 10999901, 100909001, 109000901, 109090901, 109909901, 109999901, 1090000901, 1090990901, 1099009901, 1099999901, 10090909001, 10900000901, 10900900901, 10909090901, 10909990901
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OFFSET
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1,2
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COMMENTS
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In this sequence 0 is not allowed as an addend. If 0 were allowed then 0 would be a term and 1 and 11 would not. - Yuan-Hao Huang, Aug 31 2020
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LINKS
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EXAMPLE
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191 is not in the sequence since it is the arithmetic mean of two distinct positive palindromes, 9 and 373.
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CROSSREFS
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KEYWORD
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base,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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