This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A274464 #17 Jun 27 2016 03:58:02 %S A274464 6,76,139376,114087109376,792415373740081787109376, %T A274464 88398678125844615295893380022607743740081787109376, %U A274464 3724919229963099270422168663257939520419136188999442576576769103890995893380022607743740081787109376 %N A274464 Subsequence of the automorphic numbers (A003226) with initial term 6 and such that a(n+1) ends with the digits of a(n). %C A274464 An automorphic number is a number whose square ends in the same digits as the number itself. %C A274464 The next term has 200 digits. %H A274464 Colin Barker, <a href="/A274464/b274464.txt">Table of n, a(n) for n = 1..10</a> %H A274464 Wikipedia, <a href="http://en.wikipedia.org/wiki/Automorphic_number">Automorphic number</a> %o A274464 (PARI) %o A274464 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 A274464 seq(6, 8) %Y A274464 Cf. A003226, A274463. %K A274464 nonn,base %O A274464 1,1 %A A274464 _Colin Barker_, Jun 24 2016