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A171704 The first n-fold intrinsically 5-palindrome (represented in base ten). 25

%I

%S 17,2293,267140,4838419019

%N The first n-fold intrinsically 5-palindrome (represented in base ten).

%C The fourth term, which is first 5-palindromic in base 91, is almost a concatenation of base-ten 5-palindromes.

%C A217146 gives the sequence of values 5-palindromic in at least 4 bases. The search there indicates a fifth term here has first base of 5-palindromicity above 200. - _James G. Merickel_ Oct 19 2012

%C a(5) > 10^14. - _Hiroaki Yamanouchi_, Aug 22 2015

%e a(2)=2293 is 33133 in base 5 and 14341 in base 6;

%e a(3)=267140 is 6D4D6, 54245 and 29E92 in bases 14, 15 and 18, respectively.

%Y Cf. A171701, A171702, A171703, A171705, A171706, A171740, A171741, A171742 A217146.

%K nonn,more,base

%O 1,1

%A _James G. Merickel_, Dec 17 2009

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Last modified December 7 21:06 EST 2016. Contains 278895 sequences.