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A171702 The first number that is (at least) n-fold intrinsically 3-palindromic (represented in base ten). 25

%I #34 Apr 22 2016 09:53:16

%S 5,26,121,300,1009,1477,4591,15049,35101,35101,83161,176401,291721,

%T 291721,720721,1081081,1496881,2106721,3341521,3341521,5654881,

%U 7207201,8648641,10810801,13693681,15135121,21621601,28274401,28274401,41081041,41081041,41081041

%N The first number that is (at least) n-fold intrinsically 3-palindromic (represented in base ten).

%H Giovanni Resta, <a href="/A171702/b171702.txt">Table of n, a(n) for n = 1..100</a> [terms a(1)-a(38) computed by Hiroaki Yamanouchi; a(39)-a(100) by _Giovanni Resta_, Apr 22 2016]

%e a(1)=5 is 101 in base 2.

%e a(2)=26 is 222 in base 3 and 101 in base 5.

%e a(3)=121 is 232 in base 7 and 171 in base 8.

%Y Cf. A171701, A171703, A171704, A171705, A171706, A171740, A171741, A171742.

%K nonn,base

%O 1,1

%A _James G. Merickel_, Dec 15 2009

%E a(21)-a(32) from _Hiroaki Yamanouchi_, Sep 20 2014

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Last modified April 19 18:05 EDT 2024. Contains 371798 sequences. (Running on oeis4.)