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 A256578 #4 Apr 02 2015 17:07:24 %S A256578 1,1,2,1,4,1,3,1,6,1,5,3,8,5,7,1,7,10,1,9,1,12,1,11,23,14,9,13,5,13, %T A256578 19,1,18,7,17,11,16,1,15,1,20,1,21,1,22,15,23,1,24,7,25,17,26,1,27,11, %U A256578 28,19,29,1,30,1,31,21,32,13,33,1,34,67,40,1,39,11 %N A256578 Largest proper divisor of A166133(n). %C A256578 a(n) = A032742(A166133(n)). %H A256578 Reinhard Zumkeller, <a href="/A256578/b256578.txt">Table of n, a(n) for n = 1..10000</a> %o A256578 (Haskell) %o A256578 a256578 = a032742 . a166133 %Y A256578 Cf. A166133, A032742, A244080. %K A256578 nonn %O A256578 1,3 %A A256578 _Reinhard Zumkeller_, Apr 02 2015