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 A276568 #9 Sep 12 2016 17:02:25 %S A276568 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,20,21,22,23,24,25,26,27, %T A276568 28,29,30,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,50,51,52, %U A276568 53,54,55,56,57,58,60,61,62,63,64,65,66,67,68,69,70,71,72,74,75,76,77,78,80,81,82,83,84,86,87,88,89,90,91 %N A276568 Numbers such that ludic factor of n (A272565) divides n. %H A276568 Antti Karttunen, <a href="/A276568/b276568.txt">Table of n, a(n) for n = 1..10000</a> %o A276568 (Scheme, with _Antti Karttunen_'s IntSeq-library) %o A276568 (define A276568 (ZERO-POS 1 1 (lambda (n) (modulo n (A272565 n))))) %Y A276568 Complement: A276569. %Y A276568 Indices of zeros in A276570. %Y A276568 Cf. A272565, A276440. %Y A276568 Cf. A276347 (subsequence). %K A276568 nonn %O A276568 1,2 %A A276568 _Antti Karttunen_, Sep 11 2016