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A114120 Palindromes which are not the arithmetic mean of two distinct palindromes. 1
11, 10901, 109901, 1090901, 1099901, 10900901, 10999901, 100909001, 109000901, 109090901, 109909901, 109999901, 1090000901, 1090990901, 1099009901, 1099999901, 10090909001, 10900000901, 10900900901, 10909090901, 10909990901 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..21.

EXAMPLE

191 is not in the sequence since it is the arithmetic mean of two distinct palindromes, 9 and 373.

CROSSREFS

Cf. A083158.

Sequence in context: A121520 A308335 A083442 * A118557 A267273 A138713

Adjacent sequences:  A114117 A114118 A114119 * A114121 A114122 A114123

KEYWORD

base,nonn

AUTHOR

Giovanni Resta, Feb 06 2006

STATUS

approved

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Last modified April 6 16:14 EDT 2020. Contains 333276 sequences. (Running on oeis4.)