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a(n)=(s(n)+1)/8, where s(n)=n-th base 8 palindrome that starts with 7.
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%I #5 Jul 12 2012 00:39:47

%S 1,8,57,58,59,60,61,62,63,64,449,458,467,476,485,494,503,512,3585,

%T 3593,3601,3609,3617,3625,3633,3641,3650,3658,3666,3674,3682,3690,

%U 3698,3706,3715,3723,3731,3739,3747,3755,3763,3771

%N a(n)=(s(n)+1)/8, where s(n)=n-th base 8 palindrome that starts with 7.

%K nonn,base

%O 1,2

%A _Clark Kimberling_