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a(n+1) = a(n) converted to base 8 from base 5 (written in base 10).
1

%I #11 Nov 08 2016 07:49:49

%S 5,8,11,17,26,65,152,578,2243,13595,136928,2998403,174466115,

%T 28477359896,19337050327073,144515706183103139,

%U 10653202726476848136212,21365388661232868517558200530,2895720987277797407056788297006319688

%N a(n+1) = a(n) converted to base 8 from base 5 (written in base 10).

%H John Cerkan, <a href="/A023381/b023381.txt">Table of n, a(n) for n = 1..31</a>

%t NestList[FromDigits[IntegerDigits[#,5],8]&,5,20] (* _Harvey P. Dale_, May 07 2012 *)

%K nonn

%O 1,1

%A _David W. Wilson_