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 A082027 #6 Feb 28 2013 09:21:05 %S A082027 6,36,936,81936,64181936,3616164181936,93613613616164181936, %T A082027 819361936193613613616164181936, %U A082027 641819361819361819361936193613613616164181936 %N A082027 a(1)=6; a(n) is concatenation of the squares of each digit of a(n-1), in order (in base 10). %C A082027 If m is a member of the sequence consisting of k base-10 digits, every member of the sequence greater than m is congruent to m modulo 10^k. %e A082027 a(4)=81936 because the squares of the digits of a(3)--namely, 9, 3 and 6--are 81, 9 and 36 respectively. %t A082027 NestList[FromDigits[Flatten[IntegerDigits/@(IntegerDigits[#]^2)]]&,6,10] (* _Harvey P. Dale_, Feb 28 2013 *) %Y A082027 Cf. A061588, A082026. %K A082027 base,easy,nonn %O A082027 1,1 %A A082027 _Matthew Vandermast_, Apr 01 2003