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 A091663 #17 Jul 29 2017 21:08:11 %S A091663 5,7,3,9,0,1,7,8,7,1,8,0,0,4,7,3,4,7,7,0,6,2,2,0,0,8,3,3,9,8,5,9,9,0, %T A091663 9,8,3,0,1,9,6,7,6,7,5,6,7,5,2,4,4,9,9,9,8,8,1,6,3,1,9,1,4,0,9,4,3,3, %U A091663 8,7,3,9,9,0,1,0,9,4,1,6,0,7,9,1,0,3,8,1,9,8,0,8,6,2,9,9,6,4,0,6 %N A091663 10-adic integer x=.....93380022607743740081787109375 satisfying x^3 = x. %C A091663 Let a,b be integers defined in A018247, A018248 satisfying a^2=a, b^2=b, obviously a^3=a, b^3=b; let c,d,e,f be integers defined in A091661, A063006, A091663, A091664 then c^3=c, d^3=d, e^3=e, f^3=f, c+d=1, a+e=1, b+f=1, b+c=a, d+f=e, a+f=c, a=f+1, b=e+1, cd=-1, af=-1, gh=-1 where -1=.....999999999. %H A091663 Seiichi Manyama, <a href="/A091663/b091663.txt">Table of n, a(n) for n = 0..9999</a> %F A091663 For n > 0, a(n) = 9 - A018247(n) = A018248(n). - _Seiichi Manyama_, Jul 28 2017 %t A091663 To calculate c, d, e, f use Mathematica algorithms for a, b and equations: c=a-b, d=1-c, e=b-1, f=a-1. %Y A091663 Cf. A018247, A018248. %K A091663 base,nonn %O A091663 0,1 %A A091663 Edoardo Gueglio (egueglio(AT)yahoo.it), Jan 28 2004