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 A280698 #8 Jan 12 2017 07:19:52 %S A280698 1,1,2,1,1,3,1,1,4,3,1,7,1,3,11,1,1,18,1,7,29,3,1,47,11,3,76,7,1,123, %T A280698 1,1,199,3,29,322,1,3,521,47,1,843,1,7,1364,3,1,2207,29,123,3571,7,1, %U A280698 5778,199,47,9349,3,1,15127,1,3,24476,1,521,39603,1,7,64079,843,1,103682,1,3,167761,7,199,271443,1,2207,439204,3,1,710647,3571,3,1149851,47,1 %N A280698 Greatest Lucas number that is a proper divisor of the n-th Lucas number, a(1) = 1. %H A280698 Antti Karttunen, <a href="/A280698/b280698.txt">Table of n, a(n) for n = 1..521</a> %F A280698 a(n) = A280696(A000204(n)). %o A280698 (Scheme) (define (A280698 n) (A280696 (A000204 n))) %Y A280698 Cf. A000032, A000204, A105800, A280696, A280699. %K A280698 nonn %O A280698 1,3 %A A280698 _Antti Karttunen_, Jan 11 2017