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(s(n)+1)/9, where s(n)=n-th base 9 palindrome that starts with 8.
1

%I #5 Jul 12 2012 00:39:47

%S 1,9,73,74,75,76,77,78,79,80,81,649,659,669,679,689,699,709,719,729,

%T 5833,5842,5851,5860,5869,5878,5887,5896,5905,5915,5924,5933,5942,

%U 5951,5960,5969,5978,5987,5997,6006,6015,6024,6033,6042

%N (s(n)+1)/9, where s(n)=n-th base 9 palindrome that starts with 8.

%K nonn,base

%O 1,2

%A _Clark Kimberling_