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%I #17 Jun 27 2016 03:58:02
%S 6,76,139376,114087109376,792415373740081787109376,
%T 88398678125844615295893380022607743740081787109376,
%U 3724919229963099270422168663257939520419136188999442576576769103890995893380022607743740081787109376
%N Subsequence of the automorphic numbers (A003226) with initial term 6 and such that a(n+1) ends with the digits of a(n).
%C An automorphic number is a number whose square ends in the same digits as the number itself.
%C The next term has 200 digits.
%H Colin Barker, <a href="/A274464/b274464.txt">Table of n, a(n) for n = 1..10</a>
%H Wikipedia, <a href="http://en.wikipedia.org/wiki/Automorphic_number">Automorphic number</a>
%o (PARI)
%o seq(m, maxn) = L=List(); for(j=1, maxn, listput(L, m); m=(3*m^2-2*m^3)%10 ^ (2*sizedigit(m))); Vec(L)
%o seq(6, 8)
%Y Cf. A003226, A274463.
%K nonn,base
%O 1,1
%A _Colin Barker_, Jun 24 2016
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