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 A136498 #2 Mar 30 2012 18:57:10 %S A136498 2,7,9,11,14,20,25,29,31,36,38,40,42,45,49,52,55,57,61,64,67,73,78,80, %T A136498 82,85,90,95,100,105,107,112,115,117,121,123,128,130,135,141,143,146, %U A136498 150,152,157,159,164,166,168,170,173,177,179,182,185,189,194,199,202 %N A136498 Solution of the complementary equation b(n)=a(a(n))+a(n); this is the sequence b. Sequence a is A136497. %D A136498 Clark Kimberling, "Complementary Equations," Journal of Integer Sequences 10 (2007) Article 07.1.4, 1-14. %e A136498 b(1) = a(a(1))+a(1) = 1+1 = 2; %e A136498 b(2) = a(a(2))+a(2) = 4+3 = 7; %e A136498 b(3) = a(a(3))+a(3) = 5+4 = 9. %Y A136498 Cf. A136497. %K A136498 nonn %O A136498 1,1 %A A136498 _Clark Kimberling_, Jan 01 2008