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A083153 a(1) = 7, a(n) = smallest nontrivial palindromic multiple of a(n-1). a(n) is not equal to a(n-1) or a concatenation of a(n-1) with itself.

%I A083153 #9 Aug 11 2024 14:41:34
%S A083153 7,161,1771,161161,1772771,414828414,4107216127014,45179377397154,
%T A083153 410725719917527014,210233245545545542332012,
%U A083153 210023222533245542335222320012,21212345475857799775857454321212,2100232225542478645885468742455222320012
%N A083153 a(1) = 7, a(n) = smallest nontrivial palindromic multiple of a(n-1). a(n) is not equal to a(n-1) or a concatenation of a(n-1) with itself.
%H A083153 Giovanni Resta, <a href="/A083153/b083153.txt">Table of n, a(n) for n = 1..18</a>
%H A083153 P. De Geest, <a href="https://www.worldofnumbers.com/em36.htm">WONplate 36</a>
%Y A083153 Cf. A083154, A068667, A083147, A083149, A083151, A083155.
%K A083153 base,nonn
%O A083153 1,1
%A A083153 _Amarnath Murthy_ and Meenakshi Srikanth (menakan_s(AT)yahoo.com), Apr 25 2003
%E A083153 More terms from _Patrick De Geest_, Jun 05 2003
%E A083153 a(13) from _Giovanni Resta_, Sep 25 2019