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 A115407 #3 Mar 30 2012 18:50:53 %S A115407 0,2,4,1,0,1,0,6,8,3,10,2,3,12,2,1,0,14,1,0,16,18,5,20,22,4,24,26,28, %T A115407 30,5,32,34,4,36,3,38,2,40,42,44,1,0,3,46,2,48 %N A115407 Unique m such that A024431(A115406(n)) - A024431(m) = n. %C A115407 A024431(A115406(n)) - A024431(a(n)) = n. %Y A115407 Cf. A115408. %K A115407 nonn %O A115407 1,2 %A A115407 _Reinhard Zumkeller_, Jan 22 2006